CHICAGO RIVET & MACHINE CO
SC TO-I, 2000-03-16
METALWORKG MACHINERY & EQUIPMENT
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<PAGE>   1
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            -------------------------
                                   SCHEDULE TO

                             TENDER OFFER STATEMENT
                   (UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE
                        SECURITIES AND EXCHANGE COMMISSION
                            -------------------------
                           CHICAGO RIVET & MACHINE CO.
                                (Name of Issuer)

                      CHICAGO RIVET & MACHINE CO. (Issuer)
 (Name of Filing Person (identifying status as Offeror, Issuer or Other Person))

                    COMMON STOCK, PAR VALUE $1.00 PER SHARE
                         (Title of Class of Securities)

                                   168088-10-2
                      (CUSIP Number of Class of Securities)

                                John C. Osterman
                                    President
                           Chicago Rivet & Machine Co.
                               901 Frontenac Road
                              Naperville, Illinois
                                 (630) 357-8500

                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications
                         on Behalf of the Filing Person)

                                    COPY TO:

                          Charles W. Mulaney, Jr., Esq.
                 Skadden, Arps, Slate, Meagher & Flom (Illinois)
                              333 West Wacker Drive
                             Chicago, Illinois 60606
                                 (312) 407-0700

                            CALCULATION OF FILING FEE
               TRANSACTION VALUATION*        AMOUNT OF FILING FEE
                     $5,175,000                     $1,035

- --------------------
*    Assumes purchase of 225,000 shares of common stock, par value $1.00 per
     share, at the maximum tender offer price of $23.00 per share.

[ ]  Check box if any part of the fee is offset as provided by Rule 0-11(a)(2)
     and identify the filing with which the offsetting fee was previously paid.
     Identify the previous filing by registration statement number, or the Form
     or Schedule and the date of its filing.

     Amount Previously Paid: N/A                               Filing Party: N/A
     Form or Registration No.: N/A                               Date Filed: N/A

[ ]  Check the box if the filing relates solely to preliminary communications
     made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the
statement relates:

<TABLE>
<S>                                                       <C>
[ ]  Third-party tender offer subject to Rule 14d-1.        [X]  Issuer tender offer subject to Rule 13c-4.

[ ]  Going-private transaction subject to Rule 13e-3.       [ ]  Amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results of the tender offer: [ ]
</TABLE>

================================================================================




<PAGE>   2


         This Tender Offer Statement on Schedule TO relates to the offer by
Chicago Rivet & Machine Co., an Illinois corporation, to purchase up to 225,000
shares (or such lesser number of shares as are properly tendered) of its Common
Stock, par value $1.00 per share, including the associated preferred stock
purchase rights issued pursuant to the Rights Agreement, dated as of November
22, 1999, between the Issuer and First Chicago Trust Company of New York, as the
Rights Agent, at a price not in excess of $23.00 nor less than $20.00 per share,
net to the seller in cash, without interest, as specified by shareholders
tendering their shares, upon the terms and subject to the conditions set forth
in the Offer to Purchase dated March 16, 2000 and in the related Letter of
Transmittal, which, as amended or supplemented from time to time, together
constitute the offer. This Schedule TO is intended to satisfy the reporting
requirements of Section Rule-14(c)(2) of the Securities Exchange Act of 1934, as
amended. Copies of the Offer to Purchase and the related Letter of Transmittal
are filed with this Schedule TO as Exhibits (a)(1)(A) and (a)(1)(B).

         The information in the Offer to Purchase and the related Letter of
Transmittal, copies of which are filed with this Schedule TO as Exhibit
(a)(1)(A) and (a)(1)(B), is incorporated in this Schedule TO by reference in
answer to Items 1 through 11 of this Tender Offer Statement on Schedule TO.

ITEM 12.  EXHIBITS.

(a)(1)(A)      Offer to Purchase, dated March 16, 2000

(a)(1)(B)      Letter of Transmittal

(a)(1)(C)      Notice of Guaranteed Delivery

(a)(1)(D)      Letter to brokers, dealers, commercial banks, trust companies and
               other nominees, dated March 16, 2000

(a)(1)(E)      Letter to clients for use by brokers, dealers, commercial banks,
               trust companies and other nominees, dated March 16, 2000

(a)(1)(F)      Guidelines for Certification of Taxpayer Identification Number on
               Substitute Form W-9

(a)(2)-(4)     Not applicable

(a)(5)(A)      Press Release, dated March 16, 2000

(a)(5)(B)      Letter to shareholders from the Chairman of the Board of the
               Issuer, dated March 16, 2000

(b)            Bank of America, N.A. Commitment Letter, dated March 14, 2000

(d)            Not applicable

(g)            Not applicable

(h)            Not applicable




                                       2

<PAGE>   3

                                    SIGNATURE

         After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

                                          CHICAGO RIVET & MACHINE CO.


                                          By: /s/  John C. Osterman
                                             ------------------------------
                                             Name: John C. Osterman
                                             Title:   President


Date:  March 16, 2000



                                       3

<PAGE>   4



                                  EXHIBIT INDEX

<TABLE>
<CAPTION>
EXHIBIT
NUMBER             DESCRIPTION
- --------       --------------------
<S>           <C>
(a)(1)(A)      Offer to Purchase, dated March 16, 2000

(a)(1)(B)      Letter of Transmittal

(a)(1)(C)      Notice of Guaranteed Delivery

(a)(1)(D)      Letter to brokers, dealers, commercial banks, trust companies and
               other nominees, dated March 16, 2000

(a)(1)(E)      Letter to clients for use by brokers, dealers, commercial banks,
               trust companies and other nominees, dated March 16, 2000

(a)(1)(F)      Guidelines for Certification of Taxpayer Identification Number on
               Substitute Form W-9

(a)(2)-(4)     Not applicable

(a)(5)(A)      Press Release, dated March 16, 2000

(a)(5)(B)      Letter to shareholders from the Chairman of the Board of the
               Issuer, dated March 16, 2000

(b)            Bank of America, N.A. Commitment Letter, dated March 14, 2000

(d)            Not applicable

(g)            Not applicable

(h)            Not applicable
</TABLE>




<PAGE>   1

                               Chicago Rivet Logo
                        OFFER TO PURCHASE FOR CASH UP TO
                       225,000 SHARES OF ITS COMMON STOCK
           (INCLUDING THE ASSOCIATED PREFERRED STOCK PURCHASE RIGHTS)
                  AT A PURCHASE PRICE NOT GREATER THAN $23.00
                         NOR LESS THAN $20.00 PER SHARE

     THE OFFER, PRORATION PERIOD AND WITHDRAWAL RIGHTS EXPIRE AT 5:00 P.M., NEW
YORK CITY TIME, ON FRIDAY, APRIL 14, 2000, UNLESS THE OFFER IS EXTENDED.

     Chicago Rivet & Machine Co., an Illinois corporation, invites its
shareholders to tender up to 225,000 shares of its common stock, par value $1.00
per share, to Chicago Rivet at prices not greater than $23.00 nor less than
$20.00 per share in cash, as specified by tendering shareholders. Chicago
Rivet's offer is being made upon the terms and subject to the conditions set
forth in this Offer to Purchase and the related Letter of Transmittal which, as
amended from time to time, together constitute the offer. Unless the context
requires otherwise, all references to shares includes the associated preferred
stock purchase rights.

     Chicago Rivet will determine a single per share purchase price, net to the
seller in cash, without interest, that it will pay for validly tendered shares,
taking into account the number of shares tendered and the prices specified by
tendering shareholders. Chicago Rivet will select the lowest purchase price that
will allow it to buy 225,000 shares or, if a lesser number of shares are validly
tendered, all shares that are validly tendered. Chicago Rivet will pay the
purchase price for all shares validly tendered at prices at or below the
purchase price and not withdrawn. However, because of the proration provisions
described in the offer, all shares tendered at or below the purchase price will
not be purchased if the offer is oversubscribed. Chicago Rivet reserves the
right, in its sole discretion, to purchase more than 225,000 shares pursuant to
the offer.

     The offer is not conditioned on any minimum number of shares being
tendered. The offer is, however, subject to certain other conditions, including
the condition that after giving effect to the acceptance of shares validly
tendered in the offer, Chicago Rivet will continue to have at least 300
shareholders of record and the shares will remain eligible for trading on the
American Stock Exchange. See Section 6.

     At a meeting of the Board of Directors of Chicago Rivet held on February
21, 2000, the Board of Directors declared a regular quarterly dividend of $.18
per share payable on March 20, 2000 to shareholders of record on March 3, 2000
and a special dividend of $.35 per share payable on April 20, 2000 to
shareholders of record on April 5, 2000. Shareholders tendering shares pursuant
to the offer will continue to be shareholders of record until the shares are
purchased in the offer. Accordingly, if you are the record holder on the
applicable record date for the regular or special dividend, tendering your
shares will NOT prevent you from receiving the dividend because no shares will
be purchased in the offer until after April 5, 2000.

     The shares have trading privileges on the AMEX under the symbol "CVR." On
March 15, 2000 the last full trading day on the AMEX prior to announcement of
the offer, the closing per share sales price as reported on the AMEX Composite
Tape was $19.00. SHAREHOLDERS ARE URGED TO OBTAIN CURRENT MARKET QUOTATIONS FOR
THE SHARES. See Section 7.

     The Board of Directors of Chicago Rivet has unanimously approved the making
of the offer. However, you must make your own decision whether to tender your
shares and, if so, how many shares to tender and the price or prices at which
you will tender them. Neither Chicago Rivet nor its Board of Directors makes any
recommendation to any shareholder as to whether to tender or refrain from
tendering shares or as to the price
<PAGE>   2

at which you may tender your shares. Chicago Rivet has been advised that none of
its directors or executive officers intends to tender any shares pursuant to the
offer.

     If you wish to tender all or any portion of your shares registered in your
name, you should complete and sign the Letter of Transmittal in accordance with
the instructions in the Letter of Transmittal, mail or deliver it with any
required signature guarantee and any other required documents to Harris Trust
Company of New York, and either mail or deliver the stock certificates for the
shares to Harris Trust Company of New York with all other required documents or
follow the procedure for book-entry delivery described in Section 3. If your
shares are registered in the name of a broker, dealer, commercial bank, trust
company or other nominee, you should contact that broker, dealer, commercial
bank, trust company or other nominee if you desire to tender your shares and
request that nominee to tender them for you. Any shareholder who desires to
tender shares and whose certificates for the shares are not immediately
available or who cannot comply with the procedure for book-entry transfer on a
timely basis or whose other required documents cannot be delivered to Harris
Trust Company of New York by the expiration of the offer should tender the
shares by following the procedures for guaranteed delivery set forth in Section
3. To properly tender your shares, you must validly complete the Letter of
Transmittal, including the section relating to the price at which you are
tendering your shares.

     Questions and requests for assistance or for additional copies of this
Offer to Purchase, the Letter of Transmittal or the Notice of Guaranteed
Delivery may be directed to Georgeson Shareholder Communications Inc. at the
address and telephone number on the back cover of this Offer to Purchase.

     Chicago Rivet has not authorized any person to make any recommendation on
behalf of Chicago Rivet as to whether you should tender or refrain from
tendering your shares pursuant to the offer. Chicago Rivet has not authorized
any person to give any information or to make any representation in connection
with the offer on behalf of Chicago Rivet other than those contained in this
Offer to Purchase or in the Letter of Transmittal. If anyone makes any
recommendation or gives any information or representation, you must not rely
upon that recommendation, information or authorization as having been authorized
by Chicago Rivet.

                      The Dealer Manager for the Offer is:

                             BMO Nesbitt Burns Logo

                            BMO NESBITT BURNS CORP.

March 16, 2000

                                        2
<PAGE>   3

                               SUMMARY TERM SHEET

     This summary highlights the most material information from this Offer to
Purchase. To understand the offer fully and for a more complete description of
the terms of the offer, you should read carefully this entire Offer to Purchase
and Letter of Transmittal. We have included references to the sections of this
document where you will find a more complete discussion of the topics in this
summary.

WHAT SECURITIES IS CHICAGO RIVET OFFERING TO PURCHASE AND HOW MANY WILL IT
PURCHASE?

     Chicago Rivet is offering to purchase 225,000 shares of its common stock or
any lesser number of shares that shareholders tender in the offer. If more than
225,000 shares are tendered, all shares tendered at or below the purchase price
will be purchased on a pro rata basis. Consequently, all of the shares that you
tender in the offer may not be purchased even if they are tendered at or below
the purchase price. See Section 1.

HOW MUCH WILL CHICAGO RIVET PAY ME FOR MY SHARES, AND WHAT IS THE FORM OF
PAYMENT?

     - Chicago Rivet is conducting the offer through a procedure that allows you
       to select the price within a specified price range at which you are
       willing to sell your shares. The price range for this offer is $20.00 to
       $23.00.

     - Chicago Rivet will determine the lowest single per share price within the
       price range that will allow it to purchase 225,000 shares, or if fewer
       shares are tendered, all shares tendered.

     - All shares purchased will be purchased at the same price, even if you
       have selected a lower price, but no shares will be purchased above the
       purchase price determined by Chicago Rivet.

     - If you wish to maximize the chance that your shares will be purchased,
       you should check the box in the section on the Letter of Transmittal
       indicating that you will accept the purchase price determined by Chicago
       Rivet under the terms of the offer. Please note that this election could
       result in your shares being purchased at the minimum price of $20.00 per
       share.

     - Shareholders whose shares are purchased in the offer will be paid the
       purchase price, net in cash, without interest, as soon as practicable
       after the expiration of the offer period. Under no circumstances will
       Chicago Rivet pay interest on the purchase price.

     See Section 5 for more information on payment for shares accepted in the
offer.

DOES CHICAGO RIVET HAVE THE FINANCIAL RESOURCES TO PAY ME FOR MY SHARES?

     Chicago Rivet intends to obtain the approximately $5.2 million required to
purchase the shares in this offer from unsecured borrowings. Chicago Rivet has
obtained a commitment from Bank of America, N.A. to provide up to a $9 million
term loan. See Section 9.

WHEN DOES THE OFFER EXPIRE?

     The offer expires Friday, April 14, 2000, at 5:00 P.M., New York City time.
See Section 1.

CAN THE OFFER BE EXTENDED?

     Yes, Chicago Rivet may extend the offer at any time. Chicago Rivet cannot
assure you that the offer will be extended or, if it is extended, for how long.
See Section 14.

HOW WILL I BE NOTIFIED IF THE OFFER IS EXTENDED?

     If the offer is extended, Chicago Rivet will make a public announcement of
the extension no later than 9:00 a.m. on the next business day following the day
on which the offer was scheduled to expire. See Section 14.

                                        3
<PAGE>   4

WHAT IS THE PURPOSE OF THE OFFER?

     Chicago Rivet is making the offer to afford shareholders an opportunity to
sell all or a portion of their shares without the usual transaction costs
associated with open market sales. The offer also gives shareholders an
opportunity to sell their shares at a price greater than the prevailing market
price of the shares immediately prior to the announcement of the offer.
Shareholders who do not tender their shares may also benefit from the offer.
Non-tendering shareholders will own a larger proportionate interest in Chicago
Rivet and its future earnings and assets. See Section 2.

WHAT ARE THE MOST SIGNIFICANT CONDITIONS TO THE OFFER?

     Chicago Rivet is not obligated to purchase any shares in the offer if the
completion of the offer would reduce the number of record holders of its common
stock below 300 holders or cause the common stock to cease to have trading
privileges on the American Stock Exchange. Chicago Rivet's obligation to
complete the offer is also subject to other conditions. See Section 6.

IF I TENDER MY SHARES WILL I STILL RECEIVE THE REGULAR AND SPECIAL DIVIDENDS
PAYABLE TO SHAREHOLDERS OF RECORD ON MARCH 3, 2000 AND APRIL 5, 2000?

     Yes, if you are the record holder on the applicable record date for the
regular or special dividend, tendering your shares will not prevent you from
receiving the dividend, respectively.

HOW DO I TENDER MY SHARES?

     If you wish to tender shares, you must comply with the appropriate
procedure described below:

     - For shares registered in your name, you should deliver the certificates
       representing the shares together with a completed Letter of Transmittal
       to Harris Trust Company of New York, the depositary for the offer, before
       the tender offer expires. You may also follow the procedures for
       book-entry transfer of shares described in Section 3 of the Offer to
       Purchase.

     - If your shares are registered in street name, you should contact the
       broker, dealer, commercial bank, trust company or other nominee that
       holds your shares and request that they tender the shares for you.

     - If you cannot get a required document or certificate to the depositary
       before the expiration of the offer, you may have a broker, bank or other
       eligible institution which is a member of an approved Security Guarantee
       Medallion Program submit a Notice of Guaranteed Delivery guaranteeing
       that the missing item will be delivered to the depositary within three
       American Stock Exchange trading days after the date of execution of the
       notice.

     See Section 3 for more information on the procedures for tendering shares.

UNTIL WHAT TIME CAN I WITHDRAW PREVIOUSLY TENDERED SHARES?

     You may withdraw your shares at any time before 5:00 P.M. on Friday, April
14, 2000 and, unless your shares have already been accepted for payment by
Chicago Rivet, at any time after 12:00 Midnight, New York City time, on
Wednesday, May 10, 2000. See Section 4.

WHAT DO CHICAGO RIVET AND ITS BOARD OF DIRECTORS THINK OF THE OFFER?

     Neither Chicago Rivet nor its Board of Directors makes any recommendation
to you as to whether to tender or refrain from tendering your shares or as to
the purchase price at which you may choose to tender your shares. You must
decide whether to tender your shares and, if so, how many shares to tender and
the price or prices at which you will tender them. Our directors and executive
officers have advised us that they do not intend to tender any shares in the
offer. See Section 2.

                                        4
<PAGE>   5

WHAT IS THE RECENT MARKET PRICE OF MY SHARES?

     On March 15, 2000, the last full trading day before the announcement of the
offer, the last reported sale price of the shares on the American Stock Exchange
Composite Tape was $19.00. You are advised to obtain a current market quotation
for your shares. See Section 7.

WHO DO I CONTACT IF I HAVE QUESTIONS ABOUT THE TENDER OFFER?

     For additional information or assistance, you may contact Georgeson
Shareholder Communications Inc. at (800) 223-2064.

                                        5
<PAGE>   6

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
SECTION                                                                PAGE
- -------                                                                ----
<S>      <C>                                                           <C>
INTRODUCTION.........................................................    7
THE OFFER............................................................    8
 1.      Number of Shares; Proration.................................    8
 2.      Background and Purpose of the Offer; Certain Effects of the
         Offer.......................................................    9
 3.      Procedure for Tendering Shares..............................   11
 4.      Withdrawal Rights...........................................   15
 5.      Purchase of Shares and Payment of Purchase Price............   16
 6.      Certain Conditions of the Offer.............................   16
 7.      Price Range of Shares; Dividends............................   18
 8.      Interests of Directors and Executive Officers; Transactions
         and
         Arrangements Concerning the Shares..........................   19
 9.      Source and Amount of Funds..................................   20
10.      Certain Information about Chicago Rivet.....................   20
11.      Effects of the Offer on the Market for Shares; Registration
         under the Exchange Act......................................   23
12.      Certain Legal Matters; Regulatory Approvals.................   23
13.      Certain U.S. Federal Income Tax Consequences................   23
14.      Extension of the Offer; Termination; Amendments.............   25
15.      Fees and Expenses...........................................   26
16.      Miscellaneous...............................................   27
</TABLE>

                           FORWARD-LOOKING STATEMENTS

     This Offer to Purchase contains certain forward-looking statements within
the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the
Securities Exchange Act of 1934. Forward-looking statements are statements other
than historical information or statements of current condition. Some forward-
looking statements may be identified by the words "believe," "anticipated,"
"expected" or similar expressions. These statements are subject to certain risks
and uncertainties which could cause actual circumstances to differ materially
from those mentioned in this discussion, including, but not limited to:

     - the ability of Chicago Rivet to maintain its relationships with its
       significant customers,

     - increases in the prices of, or limitations on the availability of,
       Chicago Rivet's primary raw materials, or

     - a downturn in the automotive industry, upon which Chicago Rivet relies
       for sales revenue, and which is cyclical and dependent on, among other
       things, consumer spending, international economic conditions and
       regulations and policies regarding international trade.

     Many of these factors are beyond our ability to control or predict. Readers
are cautioned not to place undue reliance on these forward-looking statements.
Chicago Rivet undertakes no obligation to publish revised forward-looking
statements to reflect events or circumstances after the date hereof or to
reflect the occurrence of unanticipated events.

                                        6
<PAGE>   7

TO THE HOLDERS OF SHARES OF COMMON STOCK
OF CHICAGO RIVET & MACHINE CO.

                                  INTRODUCTION

     Chicago Rivet & Machine Co., an Illinois corporation, invites its
shareholders to tender shares of its common stock, par value $1.00 per share, to
Chicago Rivet at prices not greater than $23.00 nor less than $20.00 per share
in cash, specified by tendering shareholders upon the terms and subject to the
conditions set forth in this Offer to Purchase and the related Letter of
Transmittal which, as amended from time to time, together constitute the offer.

     Chicago Rivet will determine a single per share price, net to the seller in
cash, without interest, that it will pay for validly tendered shares, taking
into account the number of shares tendered and the prices specified by tendering
shareholders. Chicago Rivet will select the lowest purchase price that will
allow it to buy 225,000 shares validly tendered or, if a lesser number of shares
are validly tendered, all shares that are validly tendered. Chicago Rivet will
pay the purchase price for all shares validly tendered prior to the Expiration
Date (as defined in Section 1) at prices at or below the purchase price and not
withdrawn. Chicago Rivet reserves the right, in its sole discretion, to purchase
more than 225,000 shares pursuant to the offer.

     The offer is not conditioned on any minimum number of shares being
tendered. The offer is, however, subject to certain other conditions including
the condition that after giving effect to the acceptance of shares validly
tendered in the offer, Chicago Rivet will continue to have at least 300
shareholders of record and the shares will remain eligible for trading on the
American Stock Exchange. See Section 6.

     If, before the Expiration Date, more than 225,000 shares (or such greater
number of shares as Chicago Rivet may elect to purchase), are validly tendered
at or below the purchase price and not withdrawn, Chicago Rivet will purchase
shares on a pro rata basis from all shareholders who validly tender shares at
prices at or below the purchase price. Chicago Rivet will return at its own
expense all shares not purchased pursuant to the offer, including shares
tendered at prices greater than the purchase price and shares not purchased
because of proration.

     The purchase price will be paid net to the tendering shareholder in cash
without interest for all shares purchased. Tendering shareholders who hold
shares registered in their own name and who tender their shares directly to the
Depositary will not be obligated to pay brokerage commissions, solicitation fees
or, subject to Instruction 7 of the Letter of Transmittal, stock transfer taxes
on the purchase of shares by Chicago Rivet in the offer. Shareholders holding
shares through brokers or banks are urged to consult the brokers or banks to
determine whether transaction costs may apply if shareholders tender shares
through the brokers or banks and not directly to the Depositary. However, any
tendering shareholder or other payee who fails to complete, sign and return to
the Depositary the substitute form W-9 that is included with the letter of
transmittal may be subject to required backup federal income tax withholding of
31% of the gross proceeds payable to the shareholder or other payee pursuant to
the offer. See Section 3.

     Chicago Rivet will also pay all fees and expenses of BMO Nesbitt Burns
Corp., the Dealer Manager, Georgeson Shareholder Communications Inc., the
Information Agent, and Harris Trust Company of New York, the Depositary, in
connection with the offer. See Section 15.

     The Board of Directors of Chicago Rivet has unanimously approved the making
of the offer. However, you must make your own decision whether to tender your
shares and, if so, how many shares to tender and the price or prices at which
you will tender them. Neither Chicago Rivet nor its Board of Directors makes any
recommendation to any shareholder as to whether to tender or refrain from
tendering shares or as to the price at which you may tender your shares. Chicago
Rivet has been advised that none of its directors or executive officers intends
to tender any shares pursuant to the offer.

     Chicago Rivet is making the offer to afford to those shareholders who
desire liquidity an opportunity to sell all or a portion of their shares without
the usual transaction costs associated with open market sales. The offer also
gives shareholders an opportunity to sell their shares at a price greater than
the prevailing market price of the shares immediately prior to the announcement
of the offer. After the offer is completed, Chicago

                                        7
<PAGE>   8

Rivet expects to have sufficient cash flow and access to other sources of
capital to fund currently anticipated investments in its business and to operate
its existing business.

     As of the close of business on March 15, 2000, there were 1,138,096 shares
outstanding held by 418 record holders. The 225,000 shares that Chicago Rivet is
offering to purchase represent approximately 19.8% of the outstanding shares.

     A tender of shares pursuant to the offer will include a tender of the
associated preferred stock purchase rights issued pursuant to the Rights
Agreement, dated as of November 22, 1999, between Chicago Rivet and First
Chicago Trust Company of New York, as rights agent. No separate consideration
will be paid for the rights. Unless the context otherwise requires, all
references in this Offer to Purchase to the shares includes the associated
preferred stock purchase rights. For a description of the rights, see Section 7.

     The shares have trading privileges on the American Stock Exchange under the
symbol "CVR." On March 15, 2000, the last full trading day on the AMEX prior to
the announcement of the offer, the closing per share sales price as reported on
the AMEX Composite Tape was $19.00. CHICAGO RIVET URGES SHAREHOLDERS TO OBTAIN
CURRENT QUOTATIONS FOR THE SHARES.

                                   THE OFFER

1.  NUMBER OF SHARES; PRORATION

     Upon the terms and subject to the conditions of the offer, Chicago Rivet
will purchase 225,000 shares or such lesser number of shares as are validly
tendered and not withdrawn in accordance with Section 4 before the Expiration
Date at a net cash price, without interest (determined in the manner described
below), not greater than $23.00 nor less than $20.00 per share.

     The term "Expiration Date" means 5:00 P.M., New York City time, on Friday,
April 14, 2000. Chicago Rivet may, in its sole discretion, extend the period of
time during which the offer is open. If the offer is extended, the term
"Expiration Date" will refer to the latest time and date at which the offer, as
extended by Chicago Rivet, will expire. See Section 14 for a description of
Chicago Rivet's right to extend the time during which the offer is open and to
delay, terminate or amend the offer. If the offer is oversubscribed, shares
tendered at or below the purchase price before the Expiration Date will be
subject to proration. The proration period also expires on the Expiration Date.

     Chicago Rivet reserves the right, in its sole discretion, to purchase more
than 225,000 shares pursuant to the offer. See Section 14. In accordance with
applicable regulations of the Securities and Exchange Commission, Chicago Rivet
may purchase pursuant to the offer an additional amount of shares not to exceed
2% of the outstanding shares without amending or extending the offer.

     If (1) Chicago Rivet increases or decreases the price to be paid for
shares, increases or decreases the Dealer Manager's fee, increases the number of
shares it may purchase in the offer by more than 2% of the outstanding shares,
or decreases the number of shares it may purchase in the offer and (2) the offer
is scheduled to expire at any time earlier than the expiration of a period
ending on the tenth business day from, and including, the date that notice of
the increase or decrease is first published, sent or given in the manner
specified in Section 14, the offer will be extended until the expiration of the
ten business day period. For purposes of the offer, a "business day" means any
day other than a Saturday, Sunday or federal holiday and consists of the time
period from 12:01 A.M. through 12:00 Midnight, New York City time.

     The offer is not conditioned on any minimum number of shares being
tendered. The offer is, however, subject to certain other conditions. See
Section 6.

     In accordance with Instruction 5 of the Letter of Transmittal, each
shareholder desiring to tender shares must either (1) specify the price (not
greater than $23.00 nor less than $20.00 per share) at which he or she is
willing to have Chicago Rivet purchase his or her shares or (2) specify that he
or she is willing to sell his or her shares at the price determined by Chicago
Rivet in accordance with the terms of the offer, which could result in the
shares being sold at the minimum price of $20.00. Promptly following the
Expiration Date,
                                        8
<PAGE>   9

Chicago Rivet will, in its sole discretion, determine the purchase price (not
greater than $23.00 nor less than $20.00 per share) that it will pay for shares
validly tendered pursuant to the offer, taking into account the number of shares
tendered and the prices specified by tendering shareholders. Chicago Rivet will
select the lowest purchase price that will allow it to purchase 225,000 shares
validly tendered or, if a lesser number of shares are validly tendered, all
shares that are tendered and not withdrawn. Chicago Rivet will pay the purchase
price for all shares validly tendered prior to the Expiration Date at prices at
or below the purchase price and not withdrawn, upon the terms and subject to the
conditions of the offer. All shares not purchased pursuant to the offer,
including shares tendered at prices greater than the purchase price and shares
not purchased because of proration, will be returned to the tendering
shareholders at Chicago Rivet's expense as promptly as practicable following the
Expiration Date.

     In the event that prior to the Expiration Date more than 225,000 shares (or
a greater number of shares as Chicago Rivet may elect to purchase pursuant to
the offer) are validly tendered at or below the purchase price and not
withdrawn, Chicago Rivet will purchase shares validly tendered at or below the
purchase price and not withdrawn prior to the Expiration Date on a pro rata
basis. Consequently, all of the shares that a shareholder tenders in the offer
may not be purchased even if they are tendered at a price less than or equal to
the purchase price.

     Proration.  If proration is required, Chicago Rivet will determine the
final proration factor as promptly as practicable after the Expiration Date.
Proration for each shareholder tendering shares will be based on the ratio of
the number of shares tendered by the shareholder at or below the purchase price
to the total number of shares tendered by all shareholders at or below the
purchase price. This ratio will be applied to shareholders tendering shares to
determine the number of shares that will be purchased from each shareholder
pursuant to the offer. Although Chicago Rivet does not expect to be able to
announce the final results of such proration until approximately seven business
days after the Expiration Date, it will announce preliminary results of
proration by press release promptly after the Expiration Date. Shareholders may
obtain preliminary proration information from the Information Agent and may also
be able to obtain the information from their brokers.

     As described in Section 13, the number of shares that Chicago Rivet will
purchase from a shareholder may affect the United States federal income tax
consequences to the shareholder of the purchase and therefore may be relevant to
a shareholder's decision whether to tender shares. The Letter of Transmittal
affords each tendering shareholder the opportunity to designate the order of
priority in which shares tendered are to be purchased in the event of proration.

     This Offer to Purchase and the related Letter of Transmittal will be mailed
to record holders of shares as of March 15, 2000 and will be furnished to
brokers, banks and similar persons whose names, or the names of whose nominees,
appear on Chicago Rivet's shareholder list or, if applicable, who are listed as
participants in a clearing agency's security position listing for subsequent
transmittal to beneficial owners of shares.

2.  BACKGROUND AND PURPOSE OF THE OFFER; CERTAIN EFFECTS OF THE OFFER

     Chicago Rivet is making the offer to afford to those shareholders who
desire liquidity an opportunity to sell all or a portion of their shares without
the usual transaction costs associated with open market sales. After the offer
is completed, Chicago Rivet expects to have sufficient cash flow and access to
other sources of capital to fund its currently anticipated investments in its
business and to operate its existing business.

     The Board of Directors believes that, given Chicago Rivet's businesses,
assets and prospects, the purchase of the shares pursuant to the offer is an
attractive investment that will benefit Chicago Rivet and its remaining
shareholders. The offer provides shareholders who are considering a sale of all
or a portion of their shares the opportunity to determine the price or prices
(not greater than $23.00 nor less than $20.00 per share) at which they are
willing to sell their shares and, if any shares are purchased pursuant to the
offer, to sell those shares for cash to Chicago Rivet without the usual costs
associated with a market sale. The offer gives shareholders an opportunity to
sell their shares at a price greater than the prevailing market prices of the
shares immediately prior to the announcement of the offer. To the extent the
purchase of shares in the offer results in a reduction in the number of
shareholders of record, the costs to Chicago Rivet for services to shareholders
should be reduced. Shareholders who determine not to accept the offer will
increase their proportionate
                                        9
<PAGE>   10

interest in Chicago Rivet's equity, and therefore in Chicago Rivet's future
earnings and assets, subject to Chicago Rivet's right to issue additional shares
and other equity securities in the future.

     The Board of Directors approved the making of the offer after consultation
with Chicago Rivet's financial advisor, BMO Nesbitt Burns Corp. Chicago Rivet
retained Nesbitt Burns in February 2000 to provide financial advice.

     In November 1999, Chicago Rivet received an unsolicited indication of
interest from a third-party relating to a possible acquisition proposal for
Chicago Rivet. The indication of interest did not suggest any proposed price,
was subject to due diligence and did not indicate the source of financing for
any possible transaction. It also stated that if Chicago Rivet did not meet with
this third party, the third party was prepared to make a tender offer to Chicago
Rivet's shareholders at a premium to recent trading prices for the last year.
The Board of Directors of Chicago Rivet considered the indication of interest
and determined that pursuing it was not in the best interests of Chicago Rivet
or its shareholders. With this offer, the Board of Directors continues to seek
ways to maximize value for Chicago Rivet's shareholders.

     The Board of Directors of Chicago Rivet has unanimously approved the making
of the offer. However, you must make your own decision whether to tender your
shares and, if so, how many shares to tender and the price or prices at which
you will tender them. Neither Chicago Rivet nor its Board of Directors makes any
recommendation to any shareholder as to whether to tender or refrain from
tendering shares or as to the price at which you may tender your shares. Chicago
Rivet has been advised that none of its directors or executive officers intends
to tender any shares pursuant to the offer.

     As of March 15, 2000, no person was known by Chicago Rivet to be the
beneficial owner of more than 5% of the outstanding shares, except Chicago Rivet
understands from publicly available reports to the SEC that Dimensional Fund
Advisors, Inc., 1299 Ocean Drive, 11th Floor, Santa Monica, CA 90401, may be
deemed to own 74,600 outstanding shares or approximately 6.6% of the outstanding
shares; and John A. Morrissey, Chairman of the Board and Chief Executive Officer
of Chicago Rivet, and Walter W. Morrissey, a member of the Board of Directors of
Chicago Rivet, may be deemed to be a group beneficially owning 174,572 or 15.3%
of the outstanding shares. If Chicago Rivet purchases 225,000 shares pursuant to
the offer, assuming no shares beneficially owned by Dimensional, John A.
Morrissey or Walter W. Morrissey are tendered in the offer, Dimensional might be
deemed to own approximately 8.2% of the outstanding shares and John A. Morrissey
and Walter W. Morrissey might be deemed to be a group beneficially owning
approximately 19.1% of the outstanding shares. Pursuant to the Rights Agreement,
any deemed increase in the share ownership of John A. Morrissey and Walter W.
Morrissey as a result of the offer will not cause the preferred stock purchase
rights to become exercisable. See Section 7.

     In February 1990, Chicago Rivet announced that the Board of Directors had
authorized a repurchase of shares. In May 1991 and August 1994, the Board
authorized the purchase of additional shares. Pursuant to these authorizations,
Chicago Rivet was authorized to purchase up to 200,000 shares. The shares were
to be purchased from time to time in the open market or unsolicited negotiated
transactions, including block purchases. The timing and number of shares
repurchased was to be determined by overall financial and market conditions.
Since April 1990, Chicago Rivet has repurchased 150,596 shares at prices ranging
from $9 3/8 to $40 3/8 per share pursuant to the repurchase program. Rule 13e-4
under the Exchange Act prohibits Chicago Rivet from making any purchases of
shares until 10 business days after the Expiration Date, other than pursuant to
the offer. Thereafter, Chicago Rivet intends to resume its repurchase program.
Any share purchases under the repurchase program or otherwise may be on the same
terms as, or on terms more or less favorable to shareholders than, the terms of
the offer. Any future purchases by Chicago Rivet, either pursuant to the
repurchase program or otherwise, will depend on numerous factors, including the
market price of the shares, the results of the offer, Chicago Rivet's business
and financial condition and general economic and market conditions. Shares
purchased in the offer will not be counted in the aggregate number of shares to
be purchased pursuant to the repurchase program.

     Shares that Chicago Rivet acquires pursuant to the offer will be retained
as treasury stock (unless Chicago Rivet determines to retire the shares) and be
available for issue without further shareholder action (except as required by
applicable law or, if retired, the rules of any securities exchange on which
shares are
                                       10
<PAGE>   11

traded) for purposes including, but not limited to, the acquisition of other
businesses, raising of additional capital for use in Chicago Rivet's businesses,
and satisfaction of obligations under employee benefit plans. Chicago Rivet has
no current plan for issuance of shares repurchased pursuant to the offer.

     Except as disclosed in this Offer to Purchase, Chicago Rivet currently has
no plans or proposals that relate to or would result in:

     - the acquisition by any person of additional securities of Chicago Rivet
       or the disposition of securities of Chicago Rivet;

     - an extraordinary corporate transaction, such as a merger, reorganization
       or liquidation, involving Chicago Rivet or any or all of its
       subsidiaries;

     - a sale or transfer of a material amount of assets of Chicago Rivet or any
       of its subsidiaries;

     - any change in the present Board of Directors or management of Chicago
       Rivet;

     - any material change in the present dividend rate or policy, or
       indebtedness or capitalization of Chicago Rivet;

     - any other material change in Chicago Rivet's corporate structure or
       business;

     - any change in Chicago Rivet's Certificate of Incorporation or By-Laws or
       any actions which may impede the acquisition of control of Chicago Rivet
       by any person;

     - a class of equity security of Chicago Rivet ceasing to be listed on a
       national securities exchange or authorized to be quoted in an automated
       quotation system operated by a national securities association;

     - a class of equity security of Chicago Rivet becoming eligible for
       termination of registration pursuant to Section 12(g)(4) of the Exchange
       Act; or

     - the suspension of Chicago Rivet's obligation to file reports pursuant to
       Section 15(d) of the Exchange Act.

3.  PROCEDURE FOR TENDERING SHARES

     Proper Tender of Shares.  For shares to be validly tendered pursuant to the
offer:

          (1) the certificates for the shares, or confirmation of receipt of the
     shares pursuant to the procedures for book-entry transfer described below,
     together with a properly completed and duly executed Letter of Transmittal,
     or manually signed facsimile of the Letter of Transmittal, with any
     required signature guarantees, or an Agent's Message in the case of a
     book-entry transfer, and any other documents required by the Letter of
     Transmittal, must be received prior to 5:00 P.M., New York City time, on
     the Expiration Date by the Depositary at one of its address set forth on
     the back cover of this Offer to Purchase; or

          (2) the tendering shareholder must comply with the guaranteed delivery
     procedure set forth below.

     As specified in Instruction 5 of the Letter of Transmittal, each
shareholder who desires to tender shares pursuant to the offer must either (1)
check the box in the section of the Letter of Transmittal captioned "Shares
Tendered at Price Determined Pursuant to the Offer" or (2) check one of the
boxes in the section of the Letter of Transmittal captioned "Shares Tendered at
Price Determined by Shareholder" indicating the price at which shares are being
tendered. A tender of shares will be proper if and only if one of these boxes is
checked on the Letter of Transmittal.

     If you wish to maximize the chance that your shares will be purchased, you
should check the box on the letter of transmittal marked "Shares Tendered at
Price Determined Pursuant to the Offer." Note that this election could result in
your shares being purchased at the minimum price of $20.00 per share.

     If you wish to indicate a specific price (in multiples of $.125) at which
you are tendering your shares, you must check a box under the section captioned
"Shares Tendered at Price Determined by Shareholder" of the letter of
transmittal in the table labeled "Price (in dollars) per share at which shares
are being tendered." If

                                       11
<PAGE>   12

you wish to tender your shares at more than one price, you must complete
separate letters of transmittal for each price at which you are tendering
shares. The same shares cannot be tendered at more than one price.

     Shareholders who hold shares through brokers or banks are urged to consult
the brokers or banks to determine whether transaction costs may apply if
shareholders tender shares through the brokers or banks and not directly to the
Depositary.

     Signature Guarantees and Method of Delivery.  No signature guarantee is
required on the Letter of Transmittal if:

          (1) the Letter of Transmittal is signed by the registered holder of
     the shares (which, for purposes of this Section, includes any participant
     in The Depository Trust Company (the "Book-Entry Transfer Facility") whose
     name appears on a security position listing as the holder of the shares)
     tendered and the shareholder has not completed either the box entitled
     "Special Delivery Instructions" or the box entitled "Special Payment
     Instructions" on the Letter of Transmittal; or

          (2) if shares are tendered for the account of an "Eligible
     Institution."

     An "Eligible Institution" means (1) banks (as defined in Section 3(a) of
the Federal Deposit Insurance Act); (2) brokers, dealers, municipal securities
dealers, municipal securities brokers, government securities dealers and
government securities brokers (as defined in the Exchange Act); (3) credit
unions (as defined in Section 198(1)(A) of the Federal Reserve Act); (4)
national securities exchanges, registered securities associations and clearing
agencies (as these terms are defined in the Exchange Act); and (5) savings
associations (as defined in Section 3(b) of the Federal Deposit Insurance Act),
which, in each case, are members of an approved Signature Guarantee Medallion
Program.

     In all other cases, all signatures on the Letter of Transmittal must be
guaranteed by an Eligible Institution. See Instruction 1 of the Letter of
Transmittal. If a certificate representing shares is registered in the name of a
person other than the signer of a Letter of Transmittal, or if payment is to be
made, or shares not purchased or tendered are to be issued, to any person other
than the registered holder, the certificate must be endorsed or accompanied by
an appropriate stock power, in either case signed exactly as the name of the
registered holder appears on the certificate, with the signature on the
certificate or stock power guaranteed by an Eligible Institution.

     In all cases, payment for shares tendered and accepted for payment pursuant
to the offer will be made only after timely receipt by the Depositary of
certificates for the shares (or a timely confirmation of a book-entry transfer
of the shares into the Depositary's account at the Book-Entry Transfer Facility
as described below), a properly completed and duly executed Letter of
Transmittal (or manually signed facsimile of the Letter of Transmittal), or an
Agent's Message in the case of a book-entry transfer, and any other documents
required by the Letter of Transmittal.

     The method of delivery of all documents, including share certificates, the
Letter of Transmittal and any other required documents, is at the election and
risk of the tendering shareholder. If delivery is by mail, registered mail with
return receipt requested, properly insured, is recommended. In all cases,
sufficient time should be allowed to ensure timely delivery.

     Book-Entry Delivery.  The Depositary will establish an account with respect
to the shares at the Book-Entry Transfer Facility for purposes of the offer
within two business days after the date of this Offer to Purchase. Any financial
institution that is a participant in the Book-Entry Transfer Facility's system
may make book-entry delivery of the shares by causing the Book-Entry Transfer
Facility to transfer the shares into the Depositary's account in accordance with
the Book-Entry Transfer Facility's procedure for transfer. Even though delivery
of shares may be effected through book-entry transfer into the Depositary's
account at the Book-Entry Transfer Facility, a properly completed and duly
executed Letter of Transmittal (or manually signed facsimile of the Letter of
Transmittal) with any required signature guarantees, or an Agent's Message, and
any other required documents must, in any case, be transmitted to and received
by the Depositary at one of its addresses set forth on the back cover of this
Offer to Purchase prior to the Expiration Date, or the guaranteed delivery
procedure set forth below must be followed.

                                       12
<PAGE>   13

     The confirmation of a book-entry transfer of shares into the Depositary's
account at the Book-Entry Transfer Facility as described above is referred to
herein as a "Book-Entry Confirmation." Delivery of the letter of transmittal and
any other required documents to the Book-Entry Transfer Facility does not
constitute delivery to the Depositary.

     The term "Agent's Message" means a message transmitted by the Book-Entry
Transfer Facility to, and received by, the Depositary and forming a part of a
Book-Entry Confirmation, which states that the Book-Entry Transfer Facility has
received an express acknowledgment from the participant in the Book-Entry
Transfer Facility tendering the shares that such participant has received and
agrees to be bound by the terms of the Letter of Transmittal and that Chicago
Rivet may enforce such agreement against the participant.

     Guaranteed Delivery.  If a shareholder desires to tender shares pursuant to
the offer and the shareholder's share certificates cannot be delivered to the
Depositary prior to the Expiration Date (or the procedures for book-entry
transfer cannot be completed on a timely basis) or time will not permit all
required documents to reach the Depositary before the Expiration Date, the
shares may nevertheless be tendered provided that all of the following
conditions are satisfied:

          (i) the tender is made by or through an Eligible Institution;

          (ii) the Depositary receives by hand, mail, overnight courier,
     telegram or facsimile transmission, on or prior to the Expiration Date, a
     properly completed and duly executed Notice of Guaranteed Delivery
     substantially in the form Chicago Rivet has provided with this Offer to
     Purchase, including (where required) a signature guarantee by an Eligible
     Institution in the form set forth in the Notice of Guaranteed Delivery; and

          (iii) the certificates for all tendered shares in proper form for
     transfer (or a Book-Entry Transfer Confirmation with respect to all
     tendered shares), together with a properly completed and duly executed
     Letter of Transmittal or manually signed facsimile of the Letter of
     Transmittal and any required signature guarantees, or in the case of a
     book-entry transfer, an Agent's Message, and any other documents required
     by the Letter of Transmittal, are received by the Depositary no later than
     5:00 p.m., New York City time, on the third AMEX trading day after the date
     of execution of the Notice of Guaranteed Delivery.

     Return of Unpurchased Shares.  If any tendered shares are not purchased, or
if less than all shares evidenced by a shareholder's certificates are tendered,
certificates for unpurchased shares will be returned as promptly as practicable
after the expiration or termination of the offer or, in the case of shares
tendered by book-entry transfer at the Book-Entry Transfer Facility, the shares
will be credited to the appropriate account maintained by the tendering
shareholder at the Book-Entry Transfer Facility, in each case without expense to
the shareholder.

     Backup Federal Income Tax Withholding.  Under the United States federal
income tax backup withholding rules, unless an exemption applies under the
applicable law and regulations, 31% of the gross proceeds payable to a
shareholder or other payee pursuant to the offer must be withheld and remitted
to the United States Treasury, unless the shareholder or other payee provides
such person's taxpayer identification number (employer identification number or
social security number) to the Depositary and certifies under penalties of
perjury that such number is correct. Therefore, each tendering shareholder
should complete and sign the Substitute Form W-9 included as part of the Letter
of Transmittal so as to provide the information and certification necessary to
avoid backup withholding, unless such shareholder otherwise establishes to the
satisfaction of the Depositary that the shareholder is not subject to backup
withholding. Certain shareholders, including, among others, all corporations and
certain foreign shareholders (in addition to foreign corporations), are not
subject to these backup withholding and reporting requirements. In order for a
foreign shareholder to qualify as an exempt recipient, that shareholder must
submit an IRS Form W-8 or a Substitute Form W-8, signed under penalties of
perjury, attesting to that shareholder's exempt status. These statements can be
obtained from the Depositary. See Instructions 12 and 13 of the Letter of
Transmittal.

     TO PREVENT BACKUP FEDERAL INCOME TAX WITHHOLDING EQUAL TO 31% OF THE GROSS
PAYMENTS MADE TO SHAREHOLDERS FOR SHARES PURCHASED PURSUANT TO
                                       13
<PAGE>   14

THE OFFER, EACH SHAREHOLDER WHO DOES NOT OTHERWISE ESTABLISH AN EXEMPTION FROM
WITHHOLDING MUST PROVIDE THE DEPOSITARY WITH THE SHAREHOLDER'S CORRECT TAXPAYER
IDENTIFICATION NUMBER AND PROVIDE CERTAIN OTHER INFORMATION BY COMPLETING THE
SUBSTITUTE FORM W-9 INCLUDED WITH THE LETTER OF TRANSMITTAL.

     For a discussion of certain United States federal income tax consequences
to tendering shareholders, see Section 13.

     Withholding for Foreign Shareholders.  Even if a foreign shareholder has
provided the required certification to avoid backup withholding, the Depositary
will withhold United States federal income taxes equal to 30% of the gross
payments payable to a foreign shareholder or his or her agent unless the
Depositary determines that a reduced rate of withholding is available pursuant
to a tax treaty or that an exemption from withholding is applicable because such
gross proceeds are effectively connected with the conduct of a trade or business
within the United States. For this purpose, a foreign shareholder is any
shareholder that is not (1) a citizen or resident of the United States, (2) a
corporation, partnership or other entity created or organized in or under the
laws of the United States, any State or any political subdivision thereof, (3)
an estate the income of which is subject to United States federal income
taxation regardless of the source of such income or (4) a trust if the
administration of the trust is subject to the primary supervision of a United
States court and one or more United States persons has the authority to control
all substantial decisions of the trust, or if the trust has a valid election in
effect to be treated as a United States person. In order to obtain a reduced
rate of withholding pursuant to a tax treaty, a foreign shareholder must deliver
to the Depositary before the payment a properly completed and executed IRS Form
W-8 BEN. In order to obtain an exemption from withholding on the grounds that
the gross proceeds paid pursuant to the offer are effectively connected with the
conduct of a trade or business within the United States, a foreign shareholder
must deliver to the Depositary a properly completed and executed IRS Form W-8
ECI. The Depositary will determine a shareholder's status as a foreign
shareholder and eligibility for a reduced rate of, or exemption from,
withholding by reference to any outstanding certificates or statements
concerning eligibility for a reduced rate of, or exemption from, withholding
(e.g., IRS Form W-8 BEN or IRS Form W-8 ECI) unless facts and circumstances
indicate that such reliance is not warranted. A foreign shareholder may be
eligible to obtain a refund of all or a portion of any tax withheld if such
shareholder meets the "complete redemption," "substantially disproportionate" or
"not essentially equivalent to a dividend" test described in Section 13 or is
otherwise able to establish that no tax or a reduced amount of tax is due.
Backup withholding generally will not apply to amounts subject to the 30% or a
treaty-reduced rate of withholding. Foreign shareholders are urged to consult
their own tax advisors regarding the application of United States federal income
tax withholding, including eligibility for a withholding tax reduction or
exemption, and the refund procedure. See Instructions 12 and 13 of the Letter of
Transmittal.

     Tendering Shareholder's Representation and Warranty; Chicago Rivet's
Acceptance Constitutes an Agreement.  It is a violation of Rule 14e-4
promulgated under the Securities Exchange Act of 1934, for any person acting
alone or in concert with others, directly or indirectly, to tender shares for
that person's own account unless at the time of tender and at the Expiration
Date the person tendering (1) has a "net long position" equal to or greater than
the amount tendered in (a) the shares, or (b) other securities immediately
convertible into, exercisable for or exchangeable into shares ("Equivalent
Securities") and, upon the acceptance of the tender, will acquire the shares by
conversion, exchange or exercise of the Equivalent Securities to the extent
required by the terms of the offer and (2) will deliver or cause to be delivered
the shares for the purpose of tender to Chicago Rivet within the period
specified in the offer. Rule 14e-4 also provides a similar restriction
applicable to the tender or guarantee of a tender on behalf of another person. A
tender of shares made pursuant to any method of delivery set forth in the offer
will constitute the tendering shareholder's representation and warranty to
Chicago Rivet that (1) the shareholder has a "net long position" in shares or
Equivalent Securities being tendered within the meaning of Rule 14e-4, and (2)
the tender of shares complies with Rule 14e-4. Chicago Rivet's acceptance for
payment of shares tendered pursuant to the offer will constitute a binding
agreement between the tendering shareholder and Chicago Rivet upon the terms and
subject to the conditions of the offer.

                                       14
<PAGE>   15

     Determinations of Validity; Rejection of Shares; Waiver of Defects; No
Obligation to Give Notice of Defects.  All questions as to the number of shares
to be accepted, the price to be paid for shares and the validity, form,
eligibility (including time of receipt) and acceptance for payment of any tender
of shares will be determined by Chicago Rivet, in its sole discretion, and its
determination will be final and binding on all parties. Chicago Rivet reserves
the absolute right to reject any or all tenders it determines not to be in
proper form or the acceptance of or payment for any shares which may, in the
opinion of Chicago Rivet's counsel, be unlawful. Chicago Rivet also reserves the
absolute right to waive any defect or irregularity in the tender of any
particular shares or any particular shareholder. No tender of shares will be
deemed to be properly made until all defects or irregularities have been cured
or waived. None of Chicago Rivet, the Dealer Manager, the Depositary, the
Information Agent or any other person is or will be obligated to give notice of
any defects or irregularities in tenders, and none of them will incur any
liability for failure to give any notice of any defects or irregularities.

     Lost or Destroyed Certificates.  If any certificate representing shares has
been, lost, stolen or destroyed, you should notify Chicago Rivet's transfer
agent, First Chicago Trust Company of New York, at (800) 446-2617. You will then
be instructed regarding the procedures to be followed in order to replace the
certificate. SHAREHOLDERS ARE REQUESTED TO CONTACT FIRST CHICAGO TRUST COMPANY
OF NEW YORK IMMEDIATELY IN ORDER TO PERMIT TIMELY PROCESSING OF THIS
DOCUMENTATION.

     Certificates for shares (or a timely Book-Entry Confirmation), together
with a properly completed Letter of Transmittal and any other documents required
by the Letter of Transmittal (or an Agent's Message for a book-entry transfer),
must be delivered to the Depositary and not to Chicago Rivet. Any documents
delivered to Chicago Rivet will not be forwarded to the Depositary and will not
be deemed to be validly tendered.

4.  WITHDRAWAL RIGHTS

     Except as otherwise provided in this Section 4, tenders of shares pursuant
to the offer are irrevocable. Shares tendered pursuant to the offer may be
withdrawn at any time before the Expiration Date and, unless accepted for
payment by Chicago Rivet as provided in this Offer to Purchase, may also be
withdrawn after 12:00 Midnight, New York City time, on Wednesday, May 10, 2000.

     For a withdrawal to be effective, the Depositary must receive a notice of
withdrawal in written, telegraphic or facsimile transmission form on a timely
basis at the address set forth on the back cover of this Offer to Purchase. Any
notice of withdrawal must specify the name of the person who tendered the shares
to be withdrawn, the number of shares tendered, the number of shares to be
withdrawn and the name of the registered holder if different from that of the
person who tendered the shares. If the certificates for shares have been
delivered or otherwise identified to the Depositary, then, prior to the release
of the certificates, the tendering shareholder must also submit the serial
numbers shown on the particular certificates evidencing the shares and the
signature on the notice of withdrawal must be guaranteed by an Eligible
Institution (except in the case of shares tendered by an Eligible Institution).
If shares have been tendered pursuant to the procedure for book-entry transfer
described in Section 3, the notice of withdrawal must specify the name and the
number of the account at the Book-Entry Transfer Facility to be credited with
the withdrawn shares and otherwise comply with the procedures of the facility.
All questions as to the form and validity, including time of receipt, of notices
of withdrawal will be determined by Chicago Rivet, in its sole discretion, and
its determination will be final and binding on all parties. None of Chicago
Rivet, the Dealer Manager, the Depositary, the Information Agent or any other
person is or will be obligated to give any notice of any defects or
irregularities in any notice of withdrawal, and none of them will incur any
liability for failure to give any notice of any defects or irregularities.
Withdrawals may not be rescinded, and any shares properly withdrawn will
thereafter be deemed not tendered for purposes of the offer. However, withdrawn
shares may be re-tendered before the Expiration Date by again following any of
the procedures described in Section 3.

     If Chicago Rivet extends the offer, is delayed in its purchase of shares or
is unable to purchase shares pursuant to the offer for any reason, then, without
prejudice to Chicago Rivet's rights under the offer, the Depositary may, subject
to applicable law, retain on behalf of Chicago Rivet all tendered shares, and
the

                                       15
<PAGE>   16

shares may not be withdrawn except to the extent tendering shareholders are
entitled to withdrawal rights as described in this Section 4.

5.  PURCHASE OF SHARES AND PAYMENT OF PURCHASE PRICE

     Chicago Rivet will, upon the terms and subject to the conditions of the
offer, determine a single per share purchase price that it will pay for shares
validly tendered and not withdrawn pursuant to the offer, taking into account
the number of shares tendered and the prices specified by tendering
shareholders, and will purchase shares validly tendered at or below the purchase
price and not withdrawn as soon as practicable after the Expiration Date.
Chicago Rivet will be deemed to have purchased, subject to the proration
provisions, shares that are validly tendered at or below the purchase price and
not withdrawn only when, as and if it gives oral or written notice to the
Depositary of its acceptance of the shares for payment pursuant to the offer.

     Chicago Rivet will purchase all of the shares accepted for payment pursuant
to the offer as soon as practicable after the Expiration Date. In all cases,
payment for shares tendered and accepted for payment pursuant to the offer will
be made promptly, subject to possible delay in the event of proration, but only
after timely receipt by the Depositary of certificates for shares (or of a
timely Book Entry Confirmation of the shares into the Depositary's account at
the Book-Entry Transfer Facility), a properly completed and duly executed Letter
of Transmittal or manually signed facsimile of the Letter of Transmittal, or an
Agent's Message in the case of a book-entry transfer, and any other required
documents.

     Payment for shares purchased pursuant to the offer will be made by
depositing the aggregate purchase price with the Depositary, which will transmit
payment to the tendering shareholders.

     In the event of proration, Chicago Rivet will determine the proration
factor and pay for those tendered shares accepted for payment as soon as
practicable after the Expiration Date. However, Chicago Rivet does not expect to
be able to announce the final results of any proration until approximately seven
business days after the Expiration Date. Under no circumstances will Chicago
Rivet pay interest on the purchase price including, without limitation, by
reason of any delay in making payment. Certificates for all shares not
purchased, including all shares tendered at prices greater than the purchase
price and shares not purchased due to proration, will be returned or, in the
case of shares tendered by book-entry transfer, shares will be credited to the
account maintained with the Book-Entry Transfer Facility by the participant who
delivered the shares, as promptly as practicable following the Expiration Date
or termination of the offer without expense to the tendering shareholder. In
addition, if certain events occur, Chicago Rivet may not be obligated to
purchase shares pursuant to the offer. See Section 6.

     Chicago Rivet will pay all stock transfer taxes, if any, payable on the
transfer to it of shares purchased pursuant to the offer. If, however, payment
of the purchase price is to be made to, or (in the circumstances permitted by
the offer) if unpurchased shares are to be registered in the name of, any person
other than the registered holder, or if tendered certificates are registered in
the name of any person other than the person signing the Letter of Transmittal,
the amount of all stock transfer taxes, if any (whether imposed on the
registered holder or other person), payable on account of the transfer to the
person will be deducted from the purchase price unless evidence satisfactory to
Chicago Rivet of the payment of the taxes or exemption from the taxes is
submitted. See Instruction 7 of the Letter of Transmittal.

     Any tendering shareholder or other payee who fails to complete, sign and
return to the Depositary the Substitute Form W-9 included with the Letter of
Transmittal may be subject to required backup federal income tax withholding of
31% of the gross proceeds paid to the shareholder or other payee pursuant to the
offer. See Section 3 regarding federal income tax consequences for foreign
shareholders.

6.  CERTAIN CONDITIONS OF THE OFFER

     Notwithstanding any other provision of the offer, Chicago Rivet will not be
required to accept for payment, purchase or pay for any shares tendered, and may
terminate or amend the offer or may postpone the acceptance for payment of, or
the purchase of and the payment for shares tendered, subject to Rule 13e-4(f)
promulgated under the Exchange Act, if, at any time on or after March 16, 2000
and prior to the time of payment for any shares (whether any shares have been
accepted for payment, purchased or paid for pursuant
                                       16
<PAGE>   17

to the offer), any of the following events have occurred (or have been
determined by Chicago Rivet to have occurred) that, in Chicago Rivet's sole
judgment and regardless of the circumstances giving rise to the event or events
(including any action or omission to act by Chicago Rivet), makes it inadvisable
to proceed with the offer or with the acceptance for payment or payment:

     - there has been threatened, instituted or pending before any court,
       agency, authority or other tribunal any action, suit or proceeding by any
       government or governmental, regulatory or administrative agency or
       authority or by any other person, domestic or foreign, or any judgment,
       order or injunction entered, enforced or deemed applicable by any such
       court, authority, agency or tribunal, which

             (1) challenges or seeks to make illegal, or to delay or otherwise
        directly or indirectly to restrain, prohibit or otherwise affect the
        making of the offer, the acquisition of shares pursuant to the offer or
        otherwise relates in any manner to the offer; or

             (2) could, in Chicago Rivet's sole judgment, materially affect the
        business, condition (financial or other), income, operations or
        prospects of Chicago Rivet and its subsidiaries, taken as a whole, or
        otherwise materially impair in any way the contemplated future conduct
        of the business of Chicago Rivet and its subsidiaries, taken as a whole,
        or materially impair the Offer's contemplated benefits to Chicago Rivet;
        or

     - there has been any action threatened or taken, or any approval withheld,
       or any statute, rule or regulation invoked, proposed, sought,
       promulgated, enacted, entered, amended, enforced or deemed to be
       applicable to the offer or Chicago Rivet or any of its subsidiaries, by
       any government or governmental, regulatory or administrative authority or
       agency or tribunal, domestic or foreign, that, in Chicago Rivet's sole
       judgment, would or might directly or indirectly result in any of the
       consequences referred to in clause (1) or (2) above; or

     - there has occurred any of the following:

             (1) the declaration of any banking moratorium or any suspension of
        payments in respect of banks in the United States, whether or not
        mandatory;

             (2) any general suspension of trading in, or limitation on prices
        for, securities on any United States national securities exchange or in
        the over-the-counter market;

             (3) the commencement of a war, armed hostilities or any other
        national or international crisis directly or indirectly involving the
        United States;

             (4) any limitation, whether or not mandatory, by any governmental,
        regulatory or administrative agency or authority on, or any event which,
        in Chicago Rivet's sole judgment, might materially affect, the extension
        of credit by banks or other lending institutions in the United States;

             (5) any significant decrease in the market price of the shares or
        in the market prices of equity securities generally in the United States
        or any change in the general political, market, economic or financial
        conditions in the United States or abroad that could have in Chicago
        Rivet's sole judgment a material adverse effect on the business,
        condition (financial or otherwise), income, operations or prospects of
        Chicago Rivet and its subsidiaries, taken as a whole, or on the trading
        in the shares or on the proposed financing of the offer;

             (6) a material acceleration or worsening of any of the foregoing
        existing at the time of the announcement of the offer; or

             (7) any decline in either the Dow Jones Industrial Average or the
        S&P 500 Composite Index by an amount in excess of 10% measured from the
        close of business on March 15, 2000; or

     - any change shall occur or be threatened in the business, condition
       (financial or other), income, operations or prospects of Chicago Rivet
       and its subsidiaries, taken as a whole, which in Chicago Rivet's sole
       judgment is or may be material to Chicago Rivet and its subsidiaries
       taken as a whole; or

     - it has been publicly disclosed or Chicago Rivet has learned that

             (1) any person or "group" (within the meaning of Section 13(d)(3)
        of the Exchange Act) has acquired or proposes to acquire beneficial
        ownership of more than 5% of the outstanding shares

                                       17
<PAGE>   18

        whether through the acquisition of stock, the formation of a group, the
        grant of any option or right, or otherwise (other than as disclosed in a
        Schedule 13D or 13G on file with the SEC on March 15, 2000); or

             (2) any person or group that has filed a Schedule 13D or 13G on or
        prior to March 15, 2000 shall have acquired or shall propose to acquire
        whether through the acquisition of stock, the formation of a group, the
        grant of any option or right, or otherwise, beneficial ownership of
        additional shares representing 2% or more of the outstanding shares; or

     - any person or group shall have filed a Notification and Report Form under
       the Hart-Scott-Rodino Antitrust Improvements Act of 1976 reflecting an
       intent to acquire Chicago Rivet or any of its shares.

     - as of the Expiration Date, and after giving effect to the acceptance of
       shares validly tendered, Chicago Rivet will continue to have at least 300
       shareholders of record and the shares will remain eligible for trading on
       the AMEX.

     The conditions referred to above are for Chicago Rivet's sole benefit and
may be asserted by Chicago Rivet regardless of the circumstances giving rise to
any such condition (including any action or inaction by Chicago Rivet) or may be
waived by Chicago Rivet in whole or in part; provided however, that the
condition regarding the minimum number of record holders and eligibility for
trading on the AMEX may not be waived by Chicago Rivet. Chicago Rivet's failure
at any time to exercise any of the rights referred to above shall not be deemed
a waiver of any such right, and each such right shall be deemed an ongoing right
that may be asserted at any time and from time to time. In certain
circumstances, if Chicago Rivet waives any of the conditions described above, it
may be required to extend the Expiration Date of the offer. Any determination by
Chicago Rivet concerning the events described above and any related judgment or
decision by Chicago Rivet regarding the inadvisability of proceeding with the
purchase of or payment for any shares tendered will be final and binding on all
parties.

     The Exchange Act requires that all conditions to the offer must be
satisfied or waived before the Expiration Date.

7.  PRICE RANGE OF SHARES; DIVIDENDS

     The shares have trading privileges on the AMEX. The high and low sales
prices per share on the AMEX Composite Tape as compiled from published financial
sources and the quarterly cash dividends paid per share for the periods
indicated are listed below:

<TABLE>
<CAPTION>
                                                              HIGH    LOW     DIVIDENDS
                                                              ----    ----    ---------
<S>                                                           <C>     <C>     <C>
1998
  1st Quarter...............................................  $46 1/2 $ 28      $.18
  2nd Quarter...............................................  49 1/2    32       .58
  3rd Quarter...............................................  34 7/8  24 3/4     .18
  4th Quarter...............................................  30 1/2    21       .18
1999
  1st Quarter...............................................  27 3/4    23       .18
  2nd Quarter...............................................  28 3/8  19 1/8     .53
  3rd Quarter...............................................  26 7/8  20 5/8     .18
  4th Quarter...............................................  24 1/2  21 3/8     .18
2000
  First Quarter (through March 15, 2000)....................  23 1/4    19       .53(1)
</TABLE>

- ---------------
(1) Includes regular and special dividends declared on February 21, 2000,
    payable on March 20, 2000 and April 20, 2000, to holders of record of shares
    on March 3, 2000 and April 5, 2000, respectively, including holders of
    record tendering shares in the offer.

     The closing per share sales price as reported on the AMEX Composite Tape on
March 15, 2000, the last full trading day before the announcement of the offer,
was $19.00. CHICAGO RIVET URGES SHAREHOLDERS TO OBTAIN CURRENT QUOTATIONS OF THE
MARKET PRICE FOR THE SHARES.

                                       18
<PAGE>   19

     At a meeting of the Board of Directors of Chicago Rivet held on February
21, 2000, the Board of Directors declared a regular quarterly dividend of $.18
per share payable on March 20, 2000 to shareholders of record on March 3, 2000
and a special dividend of $.35 per share payable on April 20, 2000 to
shareholders of record on April 5, 2000. Shareholders tendering shares pursuant
to the offer will continue to be shareholders of record until the shares are
purchased in the offer. Accordingly, if you are the record holder on the
applicable record date for the regular or special dividend, tendering your
shares will NOT prevent you from receiving the dividend because no shares will
be purchased in the offer until after April 5, 2000.

     Rights Agreement.  On November 22, 1999, the Board of Directors of Chicago
Rivet adopted a Rights Agreement with First Chicago Trust Company of New York,
as rights agent, pursuant to which preferred stock purchase rights were
distributed to shareholders on the basis of one right for each share of common
stock outstanding. In general, the rights become exercisable or transferable
only upon the occurrence of certain events relating to the acquisition by any
person or group of beneficial ownership of 10% or more of Chicago Rivet's
outstanding securities or the commencement of a tender offer to acquire such
beneficial ownership. Once exercisable, each right entitles its holder to
purchase from Chicago Rivet 1/100th of one share of Series A Junior
Participating Preferred Stock at a purchase price of $90, subject to adjustment.
The rights expire on December 2, 2009, and, subject to certain conditions, may
be redeemed by the Board of Directors at any time at a price of $.01 per right.

     The rights are not currently exercisable and trade together with the shares
of common stock. Absent circumstances causing the rights to become exercisable
or separately tradable prior to the Expiration Date, the tender of any shares
pursuant to the offer will include the tender of the associated rights. No
separate consideration will be paid for the rights. Upon the purchase of shares
by Chicago Rivet pursuant to the offer, the sellers of the shares will no longer
own the rights associated with the purchased shares.

     The description above of the rights is qualified in its entirety by
reference to the Rights Agreement, a form of which has been included as an
exhibit to Chicago Rivet's Current Report on Form 8-K filed with the SEC on
November 24, 1999. The Form 8-K and its exhibits may be obtained from the SEC in
the manner provided in Section 10.

8.  INTERESTS OF DIRECTORS AND EXECUTIVE OFFICERS; TRANSACTIONS AND ARRANGEMENTS
CONCERNING THE SHARES

     As of March 15, 2000, there were 1,138,096 shares outstanding. The 225,000
shares that Chicago Rivet is offering to purchase represent 19.8% of the shares
outstanding as of March 15, 2000.

     As March 15, 2000, Chicago Rivet's directors and executive officers as a
group (7 persons) beneficially owned 180,022 shares, which constituted
approximately 15.8 % of the issued and outstanding shares. Each of Chicago
Rivet's directors and executive officers has advised Chicago Rivet that he or
she does not intend to tender any shares pursuant to the offer. If Chicago Rivet
purchases 225,000 shares pursuant to the offer and no director or executive
officer tenders shares pursuant to the offer, then after the purchase of shares
pursuant to the offer, Chicago Rivet's directors and executive officers as a
group would beneficially own approximately 19.7 % of the outstanding shares.

     As of March 15, 2000, no director or executive officer had beneficial
ownership of more than 1% of the outstanding shares, except John A. Morrissey,
Chairman of the Board and Chief Executive Officer of Chicago Rivet, and Walter
W. Morrissey, a member of the Board of Directors of Chicago Rivet, whose
beneficial ownership was approximately 7.9% and 7.4%, respectively, of the
outstanding shares. If Chicago Rivet purchases 225,000 shares pursuant to the
offer, assuming no shares beneficially owned by John A. Morrissey or Walter W.
Morrissey, are tendered in the offer (as is intended by John A. Morrissey and
Walter W. Morrissey), shares beneficially owned by John A. Morrissey and Walter
W. Morrissey would represent approximately 9.9% and 9.2%, respectively, of the
outstanding shares.

     Based on Chicago Rivet's records and information provided to Chicago Rivet
by its directors, executive officers, associates and subsidiaries, neither
Chicago Rivet nor any of its associates or subsidiaries or persons controlling
Chicago Rivet nor, to the best of Chicago Rivet's knowledge, any of the
directors or executive

                                       19
<PAGE>   20

officers of Chicago Rivet or any of its subsidiaries, nor any associates or
subsidiaries of any of the foregoing, has effected any transactions in the
shares during the 60 days prior to March 16, 2000.

     Except as set forth in this Offer to Purchase, neither Chicago Rivet nor,
to Chicago Rivet's knowledge, any of its affiliates, directors or executive
officers, is a party to any contract, arrangement, understanding or relationship
with any other person relating, directly or indirectly, to the offer or with
respect to any securities of Chicago Rivet, including, but not limited to, any
contract, arrangement, understanding or relationship concerning the transfer or
the voting of any such securities, joint ventures, loan or option arrangements,
puts or calls, guarantees of loans, guarantees against loss or the giving or
withholding of proxies, consents or authorizations.

9.  SOURCE AND AMOUNT OF FUNDS

     Assuming that Chicago Rivet purchases 225,000 shares pursuant to the offer
at the maximum specified purchase price of $23.00 per share, Chicago Rivet
expects the maximum aggregate cost, including all fees and expenses applicable
to the offer, to be approximately $5.5 million. The tender offer is not subject
to Chicago Rivet's receipt of financing. Chicago Rivet anticipates that
substantially all of the funds necessary to pay these amounts will be provided
through unsecured borrowings. Chicago Rivet has obtained a commitment from Bank
of America, N.A. to provide a term loan of up to $9 million with a 60-month
maturity. The interest rate for the term loan is based upon, at the election of
Chicago Rivet, Bank of America's Reference Rate less an applicable margin or the
London Interbank Offered Rate (LIBOR) plus an applicable margin. The applicable
margin is based upon Chicago Rivet's funded debt ratio. The applicable margin
for the portion of the term loan that bears interest at the Reference Rate is up
to 0.50% per annum and the applicable margin for the portion of the term loan
that bears interest at the LIBOR rate is up to 1.30% per annum. Chicago Rivet
may prepay the term loan at any time in whole or part in an amount not less than
$450,000. Prior to any advance, Chicago Rivet will enter into loan documentation
which includes representations and warranties, covenants, events of default and
other terms customary to financing of this type. A copy of the commitment has
been filed with the SEC as an exhibit to the Schedule TO filed in connection
with this offer.

     Chicago Rivet expects to repay indebtedness incurred as a result of the
offer through cash flow from operations or future borrowings.

10.  CERTAIN INFORMATION ABOUT CHICAGO RIVET

     Chicago Rivet & Machine Co. was incorporated under the laws of the State of
Illinois in December 1927, as successor to the business of Chicago Rivet &
Specialty Co. Chicago Rivet operates in two segments of the fastener industry:
fasteners and assembly equipment. The fastener segment consists of the
manufacture and sale of rivets, cold-headed fasteners and parts and screw
machine products. The assembly equipment segment consists primarily of the
manufacture of automatic rivet setting machines, automatic assembly equipment,
parts and tools for such machines, and the leasing of automatic rivet setting
machines.

     Chicago Rivet & Machine Co. is headquartered at 901 Frontenac Road,
Naperville, Illinois 60566. Its phone number is (630) 357-8500.

     Additional Information.  Chicago Rivet is subject to the informational
filing requirements of the Exchange Act and is obligated to file reports and
other information with the SEC relating to its business, financial condition and
other matters. Information, as of particular dates, concerning Chicago Rivet's
directors and officers, their remuneration options granted to them, if any, the
principal holders of Chicago Rivet's securities and any material interest of
these persons in transactions with Chicago Rivet is required to be disclosed in
proxy statements distributed to Chicago Rivet's shareholders and filed with the
SEC. Chicago Rivet also has filed an Issuer Tender offer Statement on Schedule
TO with the SEC which includes certain additional information relating to the
offer. These reports, proxy statements and other information can be inspected
and copied at the public reference facilities maintained by the SEC at 450 Fifth
Street, N.W., Room 2120, Washington, D.C. 20549; at its regional offices located
at 500 West Madison Street, Suite 1400, Chicago, Illinois 60661-2511; and 7
World Trade Center, New York, New York 10048. Copies of this material may also
be obtained by mail, upon payment of the SEC's customary charges, from the
Public
                                       20
<PAGE>   21

Reference Section of the SEC at Judiciary Plaza, 450 Fifth Street, N.W.,
Washington D.C. 20549. The SEC also maintains a web site on the Internet at
http://www.sec.gov that contains reports, proxy and information statements and
other information regarding registrants that file electronically with the SEC.

     Summary Historical and Unaudited Pro Forma Consolidated Financial
Information.  The table below contains summary historical consolidated financial
information of Chicago Rivet and its subsidiaries. The summary historical
consolidated financial information for the years ended December 31, 1999 and
1998 and as of December 31, 1999 and 1998 has been derived from the audited
consolidated financial statements of Chicago Rivet. The summary historical
condensed consolidated financial information should be read in conjunction with
and is qualified in its entirety by reference to the audited and unaudited
consolidated financial statements and the related notes thereto from which it
has been derived. More comprehensive financial information is included in the
consolidated financial statements and related notes contained in Chicago Rivet's
Annual Report on Form 10-K and Quarterly Reports on Form 10-Q, which it files
with the SEC.

     The summary unaudited consolidated pro forma financial information
contained in the table gives effect to the purchase of shares of Chicago Rivet
common stock pursuant to this Offer to Purchase, including the related
borrowings by Chicago Rivet, based on certain assumptions described below. The
unaudited consolidated pro forma income statement and balance sheet information
as of, and for the year ended, December 31, 1999 gives effect to the purchase of
common stock pursuant to the offer, including the related borrowings by Chicago
Rivet, as though such events occurred on January 1, 1999. The summary unaudited
consolidated pro forma financial information should be read in conjunction with
the summary historical condensed financial information set forth below and the
historical consolidated financial information incorporated by reference herein.
The summary unaudited consolidated pro forma financial statements are subject to
a number of uncertainties and assumptions and do not purport to be indicative of
the operating results that would actually have been obtained, or operating
results that may be obtained in the future, or the financial position that would
have resulted had the purchase of the common stock pursuant to this Offer to
Purchase, including the related borrowings by Chicago Rivet, been completed at
the dates indicated.

                                       21
<PAGE>   22

                   Summary Historical and Unaudited Pro Forma
                       Consolidated Financial Information
                          CHICAGO RIVET & MACHINE CO.
                             Year Ended December 31
                     (in thousands, except per share data)

<TABLE>
<CAPTION>
                                                                                     1999
                                                       1998       1999           PRO FORMA(1)
                                                      -------    -------    ASSUMED PURCHASE PRICE
                                                      ACTUAL     ACTUAL         PER SHARE OF:
                                                      -------    -------    ----------------------
                                                                             $20.00       $23.00
<S>                                                   <C>        <C>        <C>          <C>
INCOME STATEMENT INFORMATION:
Net sales...........................................  $44,938    $49,080     $49,080      $49,080
Income before income taxes..........................    5,077      5,229       4,550        4,501
Net income..........................................    3,360      3,454       3,012        2,980
Average shares outstanding..........................    1,159      1,151         926          926
Earnings per Share(2)...............................     2.90       3.00        3.25         3.22
BALANCE SHEET INFORMATION:
Total assets........................................   31,816     32,622      32,622       32,622
Total debt..........................................    4,950      3,150       7,650        8,325
Shareholders' equity................................   22,013     23,887      18,945       18,238
Book value per common share(3)......................    19.08      20.99       20.75        19.97
</TABLE>

- ---------------

(1) The pro forma consolidated financial information assumes a total of 225,000
    shares of common stock are purchased at $20.00 per share and $23.00 per
    share and the purchase is financed with borrowings under a term loan. The
    assumed interest rate used in the pro forma consolidated financial
    information was 7.3%. Expenses directly related to the offer were assumed to
    be $350,000. The pro forma consolidated financial information gives effect
    to the tax expense or benefit of all applicable adjustments, as described
    above, at an incremental rate of 35%.

(2) Earnings per share is calculated based upon the average number of shares
    outstanding during the prior 12 months. Pro forma earnings per share data
    assume that the transaction occurred at the beginning of the period.

(3) Book value per share is calculated as total shareholders' equity divided by
    the number of shares, or pro forma shares, outstanding at the end of the
    period.

     Incorporation by Reference.  The rules of the SEC allow us to "incorporate
by reference" information into this document, which means that we can disclose
important information to you by referring you to another document filed
separately with the SEC. This offer incorporates by reference the financial
statements and the notes related thereto contained in the documents listed below
that have been previously filed with the SEC. These documents contain important
information about Chicago Rivet.

<TABLE>
<S>                                               <C>
         SEC Filings (File No. 0-1227)                          Period
- ------------------------------------------------  -----------------------------------
Annual Report on Form 10-K                        Fiscal year ended December 31, 1998
Quarterly Reports on Form 10-Q                    Quarters ended:
                                                  - March 31, 1999
                                                  - June 30, 1999
                                                  - September 30, 1999
</TABLE>

     Chicago Rivet also incorporates by reference additional documents that it
may file with the SEC between the date of this Offer to Purchase and the date
that the offer, proration period and withdrawal rights expire. These documents
include periodic reports, such as Annual Reports on Form 10-K, Quarterly Reports
on Form 10-Q and Current Reports on Form 8-K, as well as proxy statements.

                                       22
<PAGE>   23

11.  EFFECTS OF THE OFFER ON THE MARKET FOR SHARES; REGISTRATION UNDER THE
     EXCHANGE ACT

     Chicago Rivet's purchase of shares pursuant to the offer will reduce the
number of shares that might otherwise trade publicly and is likely to reduce the
number of shareholders, but the offer is conditioned upon there being at least
300 holders of record after the consummation of the offer. The average daily
trading volume for the shares on the AMEX during the last year was less than
1,700 shares. On some days, no shares were traded. Chicago Rivet believes that
there will still be a sufficient number of shares outstanding and publicly
traded following the offer to ensure a trading market in the shares. Based on
the published guidelines of the AMEX, Chicago Rivet does not believe that its
purchase of shares pursuant to the offer will cause its remaining shares to lose
trading privileges on the AMEX.

     The shares are currently "margin securities" under the rules of the Federal
Reserve Board. This has the effect, among other things, of allowing brokers to
extend credit on the collateral of the shares. Chicago Rivet believes that,
following the purchase of shares pursuant to the offer, the shares will continue
to be "margin securities" for purposes of the Federal Reserve Board's margin
regulations.

     The shares are registered under the Exchange Act, which requires, among
other things, that Chicago Rivet furnish information to its shareholders and to
the SEC and comply with the SEC's proxy rules in connection with meetings of
Chicago Rivet's shareholders. Chicago Rivet believes that its purchase of shares
pursuant to the offer will not result in the shares becoming eligible for
deregistration under the Exchange Act.

12.  CERTAIN LEGAL MATTERS; REGULATORY APPROVALS

     Chicago Rivet is not aware of any license or regulatory permit material to
its business that might be adversely affected by its acquisition of shares as
contemplated in the offer or of any approval or other action by any government
or governmental, administrative or regulatory authority or agency, domestic or
foreign, that would be required for Chicago Rivet's acquisition or ownership of
shares as contemplated by the offer. Should any such approval or other action be
required, Chicago Rivet currently contemplates that it will seek such approval
or other action. Chicago Rivet cannot predict whether it may determine that it
is required to delay the acceptance for payment of, or payment for, shares
tendered pursuant to the offer pending the outcome of any such matter. There can
be no assurance that any approval or other action, if needed, would be obtained
or would be obtained without substantial conditions or that the failure to
obtain any approval or other action might not result in adverse consequences to
Chicago Rivet's business. Chicago Rivet's obligations under the offer to accept
for payment and pay for shares are subject to certain conditions. See Section 6.

13.  CERTAIN U.S. FEDERAL INCOME TAX CONSEQUENCES

     The following summary describes certain United States federal income tax
consequences relevant to the offer. The discussion contained in this summary is
based upon the Internal Revenue Code of 1986, as amended (the "Code"), existing
and proposed Treasury regulations promulgated thereunder, rulings,
administrative pronouncements and judicial decisions in effect as of the date
hereof changes to which could materially affect the tax consequences described
herein and could be made on a retroactive basis.

     This summary discusses only shares held as capital assets, within the
meaning of Section 1221 of the Code, and does not address all of the tax
consequences that may be relevant to particular shareholders in light of their
personal circumstances, or to certain types of shareholders (such as certain
financial institutions, dealers in securities or commodities, insurance
companies, tax-exempt organizations, "S" Corporations, expatriates, persons
subject to the alternative minimum tax or persons who hold shares as a position
in a "straddle" or as a part of a "hedging" or "conversion" transaction for
United States federal income tax purposes). In particular, the discussion of the
consequences of an exchange of shares for cash pursuant to the offer applies
only to a United States Holder. For purposes of this summary, a "United States
Holder" is a holder of shares that is (a) a citizen or resident of the United
States, (b) a corporation, partnership or other entity created or organized in
or under the laws of the United States, any state or any political subdivision
thereof, (c) an estate the income of which is subject to United States federal
income taxation regardless of its source or (d) a trust if the administration of
the trust is subject to the primary supervision of a United States court and one
or more United States persons has the authority to control all substantial
decisions of the trust,
                                       23
<PAGE>   24

or if the trust has a valid election in effect to be treated as a United States
person. This discussion does not address the tax consequences to foreign
shareholders who will be subject to United States federal income tax on a net
basis on the proceeds of their exchange of shares pursuant to the offer because
such income is effectively connected with the conduct of a trade or business
within the United States. Such shareholders are generally taxed in a manner
similar to United States Holders; however, certain special rules apply. Foreign
shareholders who are not subject to United States federal income tax on a net
basis should see Section 3 for a discussion of the applicable United States
withholding rules and the potential for obtaining a refund of all or a portion
of the tax withheld. The summary may not be applicable with respect to shares
acquired as compensation (including shares acquired upon the exercise of options
or which were or are subject to forfeiture restrictions). The summary also does
not address the state, local or foreign tax consequences of participating in the
offer.

     EACH SHAREHOLDER SHOULD CONSULT SUCH SHAREHOLDER'S TAX ADVISOR AS TO THE
PARTICULAR CONSEQUENCES OF PARTICIPATION IN THE OFFER.

     United States Holders Who Receive Cash Pursuant to the Offer.  An exchange
of shares for cash pursuant to the offer by a United States Holder will be a
taxable transaction for United States federal income tax purposes. As a
consequence of the exchange, a United States Holder will, depending on such
holder's particular circumstances, be treated either as having sold such
holder's shares or as having received a dividend distribution from Chicago
Rivet, with the tax consequences described below.

     Under Section 302 of the Code, a United States Holder whose shares are
exchanged for cash pursuant to the Exchange will be treated as having sold such
holder's shares, and thus will recognize gain or loss, if the exchange (a)
results in a "complete termination" of such holder's equity interest in Chicago
Rivet, (b) is "substantially disproportionate" with respect to such holder or
(c) is "not essentially equivalent to a dividend" with respect to the holder,
each as discussed below. In applying these tests, a United States Holder will
generally be treated as owning shares actually or constructively owned by
certain related individuals and entities.

     If a United States Holder sells shares to persons other than Chicago Rivet
at or about the time such holder also sells shares to Chicago Rivet pursuant to
the offer, and the various sales effected by the holder are part of an overall
plan to reduce or terminate such holder's proportionate interest in Chicago
Rivet, then the sales to persons other than Chicago Rivet may, for United States
federal income tax purposes, be integrated with the holder's sale of shares
pursuant to the offer and, if integrated, should be taken into account in
determining whether the holder satisfies any of the three tests described below.

     A United States Holder that either exchanges all shares actually or
constructively owned by such holder for cash pursuant to the offer or exchanges
all shares actually owned by such holder and is eligible to waive, and
effectively waives, the attribution of shares constructively owned by such
holder in accordance with procedure established by Section 302(c)(2) of the Code
will be treated as having completely terminated such holder's equity interest in
Chicago Rivet.

     An exchange of shares for cash will be "substantially disproportionate"
with respect to a United States Holder if the holder actually and constructively
owns less than 50% of the shares outstanding immediately after the exchange and
the percentage of the then outstanding shares actually and constructively owned
by such holder immediately after the exchange is less than 80% of the percentage
of the shares actually and constructively owned by such holder immediately
before the exchange.

     A United States Holder will satisfy the "not essentially equivalent to a
dividend" test if the reduction in such holder's proportionate interest in
Chicago Rivet constitutes a "meaningful reduction" given such holder's
particular facts and circumstances. The IRS has indicated in published and
private rulings that any reduction in the percentage interest of a shareholder
whose relative stock interest in a publicly held corporation is minimal (an
interest of less than 1% should satisfy this requirement) and who exercises no
control over corporate affairs should constitute such a "meaningful reduction."

     If a United States Holder is treated as having sold such holder's shares
under any of the tests described above, such holder will recognize gain or loss
equal to the difference between the amount of cash received and
                                       24
<PAGE>   25

such holder's tax basis in the shares exchanged therefor. Any such gain or loss
will be capital gain or loss and will be long-term capital gain or loss if the
holding period of the shares exceeds one year as of the date of the exchange.

     If a United States Holder who exchanges shares pursuant to the offer is not
treated under Section 302 as having sold such holder's shares for cash, the
entire amount of cash received by such holder will be treated as a dividend to
the extent of Chicago Rivet's current and accumulated earnings and profits
(which Chicago Rivet anticipates will be sufficient to cover the amount of any
such dividend) and will be includible in the holder's gross income as ordinary
income in its entirety without reduction for the tax basis of the shares
exchanged. No loss will be recognized. The United States Holder's tax basis in
the shares exchanged generally will be added to such holder's tax basis in such
holder's remaining shares. To the extent that cash received in exchange for
shares is treated as a dividend to a United States Holder that is a corporation,
such holder will be (i) eligible for a dividends-received deduction (subject to
applicable limitations) and (ii) subject to the "extraordinary dividend"
provisions of the Code. Corporate United States Holders should consult their own
tax advisors regarding whether the dividends-received deduction will be
available to them and whether the "extraordinary dividends" provisions will
apply to the ownership and disposition of their shares. To the extent, if any,
that the cash received by a United States Holder exceeds Chicago Rivet's current
and accumulated earnings and profits, it will be treated first as a tax-free
return of such holder's tax basis in the shares to the extent of such basis and
thereafter as capital gain.

     Chicago Rivet cannot predict whether or to what extent the offer will be
oversubscribed. If the offer is oversubscribed, proration of tenders pursuant to
the offer will cause Chicago Rivet to accept fewer shares than are tendered.
Therefore, a holder can be given no assurance that a sufficient number of such
holder's shares will be exchanged pursuant to the offer to ensure that such
exchange will be treated as a sale, rather than as a dividend, for United States
federal income tax purposes pursuant to the rules discussed above.

     Shareholders Who Do Not Receive Cash Pursuant to the Offer.  Shareholders
whose shares are not exchanged pursuant to the offer will not incur any tax
liability as a result of the consummation of the offer.

     See Section 3 with respect to the application of United States federal
income tax withholding to payments made to foreign shareholders and backup
withholding.

     THE TAX DISCUSSION SET FORTH ABOVE IS INCLUDED FOR GENERAL INFORMATION
ONLY. EACH SHAREHOLDER IS URGED TO CONSULT SUCH HOLDER'S OWN TAX ADVISOR TO
DETERMINE THE PARTICULAR TAX CONSEQUENCES TO HIM OR HER OF THE OFFER, INCLUDING
THE APPLICABILITY AND EFFECT OF STATE, LOCAL AND FOREIGN TAX LAWS.

14.  EXTENSION OF THE OFFER; TERMINATION; AMENDMENTS

     Chicago Rivet expressly reserves the right, in its sole discretion, at any
time and from time to time, and regardless of whether or not any of the events
set forth in Section 6 have occurred or are deemed by Chicago Rivet to have
occurred, to extend the period of time during which the offer is open and delay
acceptance for payment of, and payment for, any shares by giving oral or written
notice of the extension to the Depositary and making a public announcement of
the extension. Chicago Rivet also expressly reserves the right, in its sole
discretion, to terminate the offer and not accept for payment or pay for any
shares not theretofore accepted for payment or paid for or, subject to
applicable law, to postpone payment for shares upon the occurrence of any of the
conditions specified in Section 6 by giving oral or written notice of the
termination or postponement to the Depositary and making a public announcement
of the termination or postponement. Additionally, in certain circumstances, if
Chicago Rivet waives any of the conditions of the offer set forth in Section 6,
it may be required to extend the Expiration Date of the offer. Chicago Rivet's
reservation of the right to delay payment for shares that it has accepted for
payment is limited by Rule 13e-4(f)(5) promulgated under the Exchange Act, which
requires that Chicago Rivet must pay the consideration offered or return the
shares tendered promptly after termination or withdrawal of a tender offer.
Subject to compliance with applicable law, Chicago Rivet further reserves the
right, in its sole discretion, and regardless of whether any of the events set
forth in Section 6 have occurred or are deemed by Chicago Rivet to have
occurred, to amend the offer in any respect (including, without limitation, by
decreasing or increasing the consideration offered in the offer to holders of
shares or by decreasing or increasing the number of shares being sought in the
offer). Amendments
                                       25
<PAGE>   26

to the offer may be made at any time and from time to time by public
announcement of the amendment. In the case of an extension, the announcement
must be issued no later than 9:00 A.M., New York City time, on the next business
day after the last previously scheduled or announced Expiration Date. Any public
announcement made pursuant to the offer will be disseminated promptly to
shareholders in a manner reasonably designated to inform shareholders of the
change. Without limiting the manner in which Chicago Rivet may choose to make
any public announcement, except as provided by applicable law (including Rule
13e-4(e)(3) promulgated under the Exchange Act), Chicago Rivet will have no
obligation to publish, advertise or otherwise communicate any public
announcement other than by making a release to the PR Newswire.

     If Chicago Rivet makes a material change in the terms of the offer or the
information concerning the offer, or if it waives a material condition of the
offer, Chicago Rivet will extend the offer to the extent required by Rules
13e-4(d)(2) and 13e-4(e)(3) promulgated under the Exchange Act, which require
that the minimum period during which an offer must remain open following
material changes in the terms of the offer or information concerning the offer
(other than a change in price or a change in percentage of securities sought)
will depend upon the facts and circumstances, including the relative materiality
of such terms or information. If:

          (1) Chicago Rivet increases or decreases the price to be paid for
     shares, increases or decreases the Dealer Manager's fee, increases the
     number of shares being sought it may purchase in the offer by more than 2%
     of the outstanding shares, or decreases the number of shares it may
     purchase in the offer, and

          (2) the offer is scheduled to expire at any time earlier than the
     expiration of a period ending on the tenth business day from, and
     including, the date that notice of an increase or decrease is first
     published, sent or given,

the offer will be extended until the expiration of the ten business day period.

15.  FEES AND EXPENSES

     Chicago Rivet has retained BMO Nesbitt Burns Corp. to act as the Dealer
Manager in connection with the offer. Nesbitt Burns will receive a fee of
$100,000 for its services as Dealer Manager and advisor. Chicago Rivet also has
agreed to reimburse Nesbitt Burns for certain expenses incurred in connection
with the offer, including out-of-pocket expenses and reasonable attorney's fees
and disbursements, and to indemnify Nesbitt Burns against certain liabilities in
connection with the offer, including certain liabilities under the federal
securities laws.

     Chicago Rivet also has retained Georgeson Shareholder Communications Inc.
as Information Agent and Harris Trust Company of New York as Depositary in
connection with the offer. The Information Agent and the Depositary will receive
reasonable and customary compensation for their services. Chicago Rivet will
also reimburse the Information Agent and the Depositary for out-of-pocket
expenses, including reasonable attorneys' fees, and has agreed to indemnify the
Information Agent and the Depositary against certain liabilities in connection
with the offer, including certain liabilities under the federal securities laws.
The Dealer Manager and Information Agent may contact shareholders by mail,
telephone, telex, telegraph and personal interviews, and may request brokers,
dealers and other nominee shareholders to forward materials relating to the
offer to beneficial owners. Neither the Information Agent nor the Depositary has
been retained to make solicitations or recommendations in connection with the
offer.

     Chicago Rivet will not pay fees or commissions to any broker, dealer,
commercial bank, trust company or other person (other than the Dealer Manager)
for soliciting any shares pursuant to the offer. Chicago Rivet will, however, on
request, reimburse such persons for customary handling and mailing expenses
incurred in forwarding materials in respect of the offer to the beneficial
owners for which they act as nominees. No such broker, dealer, commercial bank
or trust company has been authorized to act as Chicago Rivet's agent for
purposes of the offer. Chicago Rivet will pay (or cause to be paid) any stock
transfer taxes on its purchase of shares, except as otherwise provided in
Instruction 7 of the Letter of Transmittal.

                                       26
<PAGE>   27

16.  MISCELLANEOUS

     Chicago Rivet is not aware of any jurisdiction where the making of the
offer is not in compliance with applicable law. If Chicago Rivet becomes aware
of any jurisdiction where the making of the offer is not in compliance with any
valid applicable law, Chicago Rivet will make a good faith effort to comply with
the law. If, after a good faith effort, Chicago Rivet cannot comply with the
law, the offer will not be made to nor will tenders be accepted from or on
behalf of, the holders of shares residing in that jurisdiction. In any
jurisdiction where the securities or blue sky laws require the offer to be made
by a licensed broker or dealer, the offer is being made on Chicago Rivet's
behalf by the Dealer Manager or one or more registered brokers or dealers
licensed under the laws of the jurisdiction.

     Pursuant to Rule 13e-4 promulgated under the Exchange Act, Chicago Rivet
has filed with the SEC an Issuer Tender offer Statement on Schedule TO, which
contains additional information relating to the offer. The Schedule TO,
including the exhibits and any amendments thereto, may be examined, and copies
may be obtained, at the same places and in the same manner set forth in Section
10 with respect to information concerning Chicago Rivet.

     You should rely only on the information contained in this document or to
which we have referred you. Chicago Rivet has not authorized anyone to provide
you with information or make any representation on behalf of Chicago Rivet in
connection with this offer other than those contained in this Offer to Purchase
or in the related Letter of Transmittal. If given or made, you should not rely
on that information or representation as having been authorized by Chicago
Rivet.

                          CHICAGO RIVET & MACHINE CO.

March 16, 2000

                                       27
<PAGE>   28

     Manually signed facsimile copies of the Letter of Transmittal will be
accepted. The Letter of Transmittal and certificates for the shares and any
other required documents should be sent or delivered by each shareholder or the
shareholder's broker, dealer, commercial bank, trust company or other nominee to
the Depositary at its address set forth below:

                        The Depositary for the offer is:
                        HARRIS TRUST COMPANY OF NEW YORK

<TABLE>
<S>                             <C>                             <C>
           By Mail:               By Facsimile Transmission:     By Hand or Overnight Courier
                                  (for Eligible Institutions
     Wall Street Station                    only)                       Receive Window
        P.O. Box 1023                                                 Wall Street Plaza
   New York, NY 10268-1023              (212) 701-7636            88 Pine Street, 19th Floor
                                                                      New York, NY 10005
                                      Confirm Facsimile
                                  Transmission by Telephone:
                                        (800) 245-7630
</TABLE>

     Any questions or requests for assistance or for additional copies of this
Offer to Purchase, the Letter of Transmittal or the Notice of Guaranteed
Delivery may be directed to the Information Agent, at the telephone number and
address below. Shareholders may also contact their broker, dealer, commercial
bank or trust company for assistance concerning the offer.

                    The Information Agent for the offer is:

                           GEORGESON SHAREHOLDER LOGO

                   GEORGESON SHAREHOLDER COMMUNICATIONS INC.
                         17 State Street -- 10th Floor
                            New York, New York 10004
                 Banks and Brokers Call Collect (212) 440-9800
                    All Others Call Toll-Free (800) 223-2064

                      The Dealer Manager for the offer is:

                             BMO NESBITT BURNS LOGO

                            BMO NESBITT BURNS CORP.
                       111 West Monroe Street, 20th Floor
                            Chicago, Illinois 60603
                           Toll Free: (877) 377-3317

<PAGE>   1

                             LETTER OF TRANSMITTAL
                                   TO TENDER
                             SHARES OF COMMON STOCK
           (INCLUDING THE ASSOCIATED PREFERRED STOCK PURCHASE RIGHTS)

                                       OF

                          CHICAGO RIVET & MACHINE CO.
                       PURSUANT TO THE OFFER TO PURCHASE
                              DATED MARCH 16, 2000

         THE OFFER, PRORATION PERIOD AND WITHDRAWAL RIGHTS WILL EXPIRE
          AT 5:00 P.M., NEW YORK CITY TIME, ON FRIDAY, APRIL 14, 2000,
                         UNLESS THE OFFER IS EXTENDED.

                        The Depositary for the offer is:

                        HARRIS TRUST COMPANY OF NEW YORK

<TABLE>
<S>                                <C>                                <C>
             By Mail:                  By Facsimile Transmission:       By Hand or Overnight Courier:
       Wall Street Station          (for Eligible Institutions only)            Receive Window
          P.O. Box 1023                      (212) 701-7636                   Wall Street Plaza
     New York, NY 10268-1023         Confirm Facsimile Transmission       88 Pine Street, 19th Floor
                                      by Telephone: (800) 245-7630            New York, NY 10005
</TABLE>

DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE WILL NOT
 CONSTITUTE A VALID DELIVERY. DELIVERIES TO CHICAGO RIVET WILL NOT BE FORWARDED
 TO THE DEPOSITARY AND THEREFORE WILL NOT CONSTITUTE VALID DELIVERY. DELIVERIES
 TO THE BOOK-ENTRY TRANSFER FACILITY WILL NOT CONSTITUTE VALID DELIVERY TO THE
                                  DEPOSITARY.

    PLEASE READ THE ENTIRE LETTER OF TRANSMITTAL, INCLUDING THE ACCOMPANYING
     INSTRUCTIONS, CAREFULLY BEFORE COMPLETING THIS LETTER OF TRANSMITTAL.

     This Letter of Transmittal is to be completed only (a) if certificates
representing shares are to be forwarded herewith, or (b) unless an Agent's
Message (as defined in the Offer to Purchase) is utilized, if delivery of shares
is to be made by book-entry transfer to the account maintained by the Depositary
at The Depository Trust Company (the "Book-Entry Transfer Facility") pursuant to
Section 3 of the Offer to Purchase.

     Shareholders whose certificates for shares are not immediately available or
who cannot deliver either the certificates for, or a Book-Entry Confirmation (as
defined in the Offer to Purchase) with respect to, their shares and all other
required documents to the Depositary on or before the Expiration Date (as
defined in the Offer to Purchase), may nevertheless tender their shares pursuant
to the guaranteed delivery procedure set forth in Section 3 of the Offer to
Purchase. See Instruction 2.
<PAGE>   2

              (BOXES BELOW FOR USE BY ELIGIBLE INSTITUTIONS ONLY)

[ ] CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER TO
    THE DEPOSITARY'S ACCOUNT AT THE BOOK-ENTRY TRANSFER FACILITY AND COMPLETE
    THE FOLLOWING:

   Name of Tendering Institution:
   -----------------------------------------------------------------------------

   Account No.:
   -----------------------------------------------------------------------------

   Transaction Code No.:
   -----------------------------------------------------------------------------

[ ] CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE OF
    GUARANTEED DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY AND COMPLETE THE
    FOLLOWING:

   Name(s) of Registered Holder(s):
   -----------------------------------------------------------------------------

   Date of Execution of Notice of Guaranteed Delivery:
   --------------------------------------------------------------------

   Name of Institution that Guaranteed Delivery:
   ---------------------------------------------------------------------------

   If delivery is by book-entry transfer, check box:  [ ]

   Name of Tendering Institution:
   -----------------------------------------------------------------------------

   Account No.:
   -----------------------------------------------------------------------------

   Transaction Code No.:
   -----------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------
                                             DESCRIPTION OF SHARES TENDERED
                                             (SEE INSTRUCTIONS 2, 3 AND 4)
- ------------------------------------------------------------------------------------------------------------------------
       NAME(S) AND ADDRESSES OF REGISTERED HOLDER(S)
             PLEASE FILL IN EXACTLY AS NAME(S)                                     SHARES TENDERED
                APPEAR(S) ON CERTIFICATE(S)                         (ATTACH ADDITIONAL SIGNED LIST IF NECESSARY)
- ------------------------------------------------------------------------------------------------------------------------
                                                                                    TOTAL NUMBER
                                                                                      OF SHARES            NUMBER
                                                                 CERTIFICATE       REPRESENTED BY         OF SHARES
                                                                NUMBER(S)(1)       CERTIFICATE(S)        TENDERED(2)
<S>                                                          <C>                 <C>                 <C>
                                                               ------------------------------------------------------
                                                               ------------------------------------------------------
                                                               ------------------------------------------------------
                                                               ------------------------------------------------------
                                                               ------------------------------------------------------
                                                               ------------------------------------------------------
                                                                Total Shares:
- ------------------------------------------------------------------------------------------------------------------------
 Indicate in this box the order (by certificate number) in which shares are to be purchased in the event of
 proration.(3) (Attach additional signed list if necessary.) See Instruction 10.
               1st:                  2nd:                  3rd:                  4th:                  5th:
- ------------------------------------------------------------------------------------------------------------------------
 (1) Need not be completed by shareholders tendering shares by book-entry transfers.
 (2) If you desire to tender fewer than all shares evidenced by any certificates listed above, please indicate in this
     column the number of such shares you wish to tender. Otherwise, all shares evidenced by such certificates will be
     deemed to have been tendered. See Instruction 4.
 (3) If you do not designate an order, then in the event less than all shares tendered are purchased due to proration,
     shares will be selected for purchase by the Depositary. See Instruction 10.
- ------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                        2
<PAGE>   3

                          PRICE (IN DOLLARS) PER SHARE
                                AT WHICH SHARES
                               ARE BEING TENDERED

              IF SHARES ARE BEING TENDERED AT MORE THAN ONE PRICE,
           A SEPARATE LETTER OF TRANSMITTAL FOR EACH PRICE SPECIFIED
                                 MUST BE USED.

            CHECK ONLY ONE BOX. IF MORE THAN ONE BOX IS CHECKED, OR
           IF NO BOX IS CHECKED, THERE IS NO VALID TENDER OF SHARES.

- --------------------------------------------------------------------------------

                            SHARES TENDERED AT PRICE
                        DETERMINED PURSUANT TO THE OFFER

[ ]  The undersigned wants to maximize the chance of having Chicago Rivet
     purchase all the shares the undersigned is tendering (subject to the
     possibility of proration). Accordingly, by checking this ONE box INSTEAD OF
     ONE OF THE PRICE BOXES BELOW, the undersigned hereby tenders shares and is
     willing to accept the purchase price determined by the Chicago Rivet in
     accordance with the terms of the offer. This action will result in
     receiving a price per share as low as $20.00 or as high as $23.00.

          ------------------------------------------------------------

                                       OR

          ------------------------------------------------------------

                                SHARES TENDERED
                       AT PRICE DETERMINED BY SHAREHOLDER

By checking ONE of the boxes below INSTEAD OF THE BOX ABOVE, the undersigned
hereby tenders shares at the price checked. This action could result in none of
the shares being purchased if the purchase price for the shares is less than the
price checked. A shareholder who desires to tender shares at more than one price
must complete a separate Letter of Transmittal for each price at which shares
are tendered. THE SAME SHARES CANNOT BE TENDERED AT MORE THAN ONE PRICE. If more
than one box is checked, or if no box is checked, there is no valid tender of
shares.

        Price (in dollars) per share at which shares are being tendered:

<TABLE>
<S>           <C>           <C>           <C>
[ ] 20.000    [ ] 20.875    [ ] 21.750    [ ] 22.625
[ ] 20.125    [ ] 21.000    [ ] 21.875    [ ] 22.750
[ ] 20.250    [ ] 21.125    [ ] 22.000    [ ] 22.875
[ ] 20.375    [ ] 21.250    [ ] 22.125    [ ] 23.000
[ ] 20.500    [ ] 21.375    [ ] 22.250
[ ] 20.625    [ ] 21.500    [ ] 22.375
[ ] 20.750    [ ] 21.625    [ ] 22.500
</TABLE>

                                        3
<PAGE>   4

            NOTE: SIGNATURES MUST BE PROVIDED BELOW. PLEASE READ THE
        INSTRUCTIONS SET FORTH IN THIS LETTER OF TRANSMITTAL CAREFULLY.

Ladies and Gentlemen:

     The undersigned hereby tenders to Chicago Rivet & Machine Co., an Illinois
corporation, the above-described shares of Chicago Rivet's common stock, $1.00
par value per share, at the price per share indicated in this Letter of
Transmittal, net to the seller in cash, without interest, upon the terms and
subject to the conditions set forth in the Offer to Purchase dated March 16,
2000, receipt of which is hereby acknowledged, and in this Letter of Transmittal
which, as amended or supplemented from time to time, together constitute the
offer.

     Subject to, and effective upon, acceptance for payment of the shares
tendered in accordance with the terms and subject to the conditions of the
offer, including, if the offer is extended or amended, the terms and conditions
of the extension or amendment, the undersigned sells, assigns and transfers to,
or upon the order of, Chicago Rivet all right, title and interest in and to all
shares tendered and orders the registration of all shares if tendered by
book-entry transfer and irrevocably constitutes and appoints the Depositary as
the true and lawful agent and attorney-in-fact of the undersigned with respect
to the shares with full knowledge that the Depositary also acts as the agent of
Chicago Rivet, with full power of substitution (the power of attorney being
deemed to be an irrevocable power coupled with an interest), to:

          (1) deliver certificate(s) representing the shares or transfer
     ownership of the shares on the account books maintained by the Book-Entry
     Transfer Facility, together, in either case, with all accompanying
     evidences of transfer and authenticity, to or upon the order of Chicago
     Rivet upon receipt by the Depositary, as the undersigned's agent, of the
     purchase price with respect to the shares;

          (2) present certificates for the shares for cancellation and transfer
     on Chicago Rivet's books; and

          (3) receive all benefits and otherwise exercise all rights of
     beneficial ownership of the shares all in accordance with the terms and
     subject to the conditions of the offer.

     The undersigned represents and warrants to Chicago Rivet that:

          (1) the undersigned has full power and authority to tender, sell,
     assign and transfer the shares tendered hereby;

          (2) when and to the extent the shares are accepted for payment,
     Chicago Rivet will acquire good, marketable and unencumbered title to the
     tendered shares, free and clear of all security interests, liens,
     restrictions, charges, encumbrances, conditional sales agreements or other
     obligations relating to the sale or transfer of the shares, and the shares
     will not be subject to any adverse claims;

          (3) the undersigned will, upon request, execute and deliver any
     additional documents deemed by the Depositary or Chicago Rivet to be
     necessary or desirable to complete the sale, assignment and transfer of the
     shares tendered; and

          (4) the undersigned has read, understands and agrees to all of the
     terms of the offer.

     The undersigned understands that tenders of shares pursuant to any one of
the procedures described in Section 3 of the Offer to Purchase and in the
instructions will constitute a binding agreement between the undersigned and
Chicago Rivet upon the terms and subject to the conditions of the offer,
including the undersigned's representation and warranty that (1) the undersigned
has a "net long position," within the meaning of Rule 14e-4 promulgated under
the Securities Exchange Act of 1934, in the shares or equivalent securities at
least equal to the shares being tendered, and (2) the tender of shares complies
with Rule 14e-4. The undersigned acknowledges that under no circumstances will
Chicago Rivet pay interest on the purchase price, including, without limitation,
by reason of any delay in making payment.

     All authority conferred or agreed to be conferred in this Letter of
Transmittal will survive the death or incapacity of the undersigned, and any
obligation of the undersigned will be binding on the heirs, personal
representatives, executors, administrators, successors, assigns, trustees in
bankruptcy and legal representatives of the undersigned. Except as stated in the
Offer to Purchase, this tender is irrevocable.

     The name(s) and address(es) of the registered holder(s) should be printed,
if they are not already printed above, exactly as they appear on the
certificates representing shares tendered. The certificate numbers, the number
of shares

                                        4
<PAGE>   5

represented by the certificates and the number of shares that the undersigned
wishes to tender, should be set forth in the appropriate boxes above. The price
at which the shares are being tendered should be indicated by either (1)
checking the box under the item "Shares Tendered at Price Determined Pursuant to
the Offer" or (2) checking ONE of the boxes listed under the item "Shares
Tendered at Price Determined by Shareholder."

     The undersigned understands that Chicago Rivet will determine a single per
share price, not in excess of $23.00 nor less than $20.00, that it will pay for
shares validly tendered and not withdrawn, taking into account the number of
shares tendered and the prices specified by tendering shareholders. Chicago
Rivet will select the lowest purchase price that will allow it to buy 225,000
shares or, if a lesser number of shares are validly tendered, all shares that
are validly tendered. All shares acquired in the offer will be acquired at the
same purchase price. All shares validly tendered at prices at or below the
purchase price and not withdrawn will be purchased, subject to the conditions of
the offer, including the proration provisions described in the Offer to
Purchase. Chicago Rivet will return all shares tendered at prices in excess of
the purchase price that is determined by Chicago Rivet and shares not purchased
because of proration.

     The undersigned recognizes that, under certain circumstances set forth in
the Offer to Purchase, Chicago Rivet may terminate or amend the offer or may
postpone the acceptance for payment of, or the payment for, shares tendered or
may not be required to purchase any shares tendered or may accept for payment
fewer than all shares tendered.

     The undersigned understands that a tender of shares pursuant to the offer
will include a tender of the associated preferred stock purchase rights issued
pursuant to the Rights Agreement, dated as of November 22, 1999, between Chicago
Rivet and First Chicago Trust Company of New York, as rights agent, and that no
separate consideration will be paid for the rights. Unless the context otherwise
requires, all references in this Letter of Transmittal to the shares includes
the associated preferred stock purchase rights. For a description of the rights,
see Section 7 of the Offer to Purchase.

     The undersigned understands that acceptance of shares by the Chicago Rivet
for payment will constitute a binding agreement between the undersigned and
Chicago Rivet upon the terms and subject to the conditions of the offer.

     Unless otherwise indicated under "Special Payment Instructions," please
issue the check for the purchase price of all shares purchased and/or return any
certificates for shares not tendered or accepted for payment in the name(s) of
the registered holder(s) appearing above under "Description of Shares Tendered."
Similarly, unless otherwise indicated under "Special Delivery Instructions,"
please mail the check for the purchase price of all shares purchased and/or
return any certificates for shares not tendered or not accepted for payment (and
any accompanying documents, as appropriate) to the address(es) of the registered
holder(s) appearing above under "Description of Shares Tendered." In the event
that the boxes entitled "Special Payment Instructions" and "Special Delivery
Instructions" are both completed, please issue the check for the purchase price
of all shares purchased and/or return any certificates evidencing shares not
tendered or not accepted for payment (and any accompanying documents, as
appropriate) in the name(s) of, and deliver the check and/or return any
certificates (and any accompanying documents, as appropriate) to, the person(s)
indicated. Unless otherwise indicated in the box entitled "Special Payment
Instructions," please credit any shares tendered herewith by book-entry transfer
that are not accepted for payment by crediting the account at the Book-Entry
Transfer Facility designated above. The undersigned recognizes that Chicago
Rivet has no obligation, pursuant to the "Special Payment Instructions," to
transfer any shares from the name of the registered holder thereof if Chicago
Rivet does not accept for payment any of the shares tendered.

                               LOST CERTIFICATES
                              (SEE INSTRUCTION 11)

[ ]  Please check here if certificates for part or all of your shares have been
     lost, stolen, misplaced or destroyed.

                                        5
<PAGE>   6

          ------------------------------------------------------------

                          SPECIAL PAYMENT INSTRUCTIONS
                        (SEE INSTRUCTIONS L, 6, 7 AND 8)

        To be completed ONLY if the check for the aggregate purchase price of
   shares purchased and/or certificates for shares not tendered or not
   purchased are to be issued in the name of someone other than the
   undersigned, or if shares tendered and delivered by book-entry transfer
   which are not purchased are to be returned by credit to an account at the
   Book-Entry Transfer Facility other than that designated above.

   Issue:  [ ] Check and/or
           [ ] Certificate(s) to:

   Name
   ----------------------------------------------------
                                    (PLEASE PRINT)

   Address
   --------------------------------------------------

          ------------------------------------------------------------
                               (INCLUDE ZIP CODE)

          ------------------------------------------------------------
                (TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NO.)
                           (SEE SUBSTITUTE FORM W-9)

   [ ] Credit shares delivered by book-entry transfer and not purchased to
       the account set forth above:

          ------------------------------------------------------------
                                 (ACCOUNT NO.)

- ------------------------------------------------------------
          ------------------------------------------------------------

                         SPECIAL DELIVERY INSTRUCTIONS
                         (SEE INSTRUCTIONS 1, 6 AND 8)

        To be completed ONLY if the check for the purchase price of shares
   purchased and/or certificates for shares not tendered or not purchased are
   to be mailed to someone other than the undersigned or to the undersigned
   at an address other than that shown below the undersigned's signature(s).

   Mail:  [ ] Check and/or
           [ ] Certificate(s) to:

   Name
   ----------------------------------------------------
                                    (PLEASE PRINT)

   Address
   --------------------------------------------------

          ------------------------------------------------------------
                               (INCLUDE ZIP CODE)

          ------------------------------------------------------------

                                        6
<PAGE>   7

                                PLEASE SIGN HERE
                     (TO BE COMPLETED BY ALL SHAREHOLDERS)
                   (ALSO COMPLETE SUBSTITUTE FORM W-9 BELOW)

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                            SIGNATURE(S) OF OWNER(S)

Dated:
- --------------------------- , 2000

Name(s) ------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                 (PLEASE PRINT)

Capacity (full title)
               -----------------------------------------------------------------

Address-------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                               (INCLUDE ZIP CODE)

Area Code and Telephone No.
                        --------------------------------------------------------

(Must be signed by registered holder(s) exactly as name(s) appear(s) on share
certificate(s) or on a security position listing or by person(s) authorized to
become registered holder(s) by certificates and documents transmitted herewith.
If signature is by a trustee, executor, administrator, guardian,
attorney-in-fact, officer of a corporation or other person acting in a fiduciary
or representative capacity, please set forth full title and see Instruction 6.)

                           GUARANTEE OF SIGNATURE(S)
                         (SEE INSTRUCTIONS 1 AND 6. TO
                         BE COMPLETED ONLY IF REQUIRED
                             BY SUCH INSTRUCTIONS.)

Name of Firm
           ---------------------------------------------------------------------

Authorized Signature
                ----------------------------------------------------------------

Name  --------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                 (PLEASE PRINT)

Title---------------------------------------------------------------------------

Address-------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                               (INCLUDE ZIP CODE)

Area Code and Telephone No.
                        --------------------------------------------------------

                                        7
<PAGE>   8

                                  INSTRUCTIONS
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER

     l.  Guarantee of Signatures.  No signature guarantee is required on this
Letter of Transmittal (a) if this Letter of Transmittal is signed by the
registered holder(s) (which term, for purposes of this Section, includes any
participant in any of the Book-Entry Transfer Facility's system whose name
appears on a security position listing as the owner of the shares) of shares
tendered herewith, unless such registered holder(s) has completed either the box
entitled "Special Payment Instructions" or the box entitled "Special Delivery
Instructions" on this Letter of Transmittal or (b) if the shares are tendered
for the account of an Eligible Institution. In all other cases, all signatures
on this Letter of Transmittal must be guaranteed by an Eligible Institution. See
Instruction 6. An "Eligible Institution" means (1) banks (as defined in Section
3(a) of the Federal Deposit Insurance Act); (2) brokers, dealers, municipal
securities dealers, municipal securities brokers, government securities dealers
and government securities brokers (as defined in the Exchange Act); (3) credit
unions (as defined in Section 198(1)(A) of the Federal Reserve Act); (4)
national securities exchanges, registered securities associations and clearing
agencies (as these terms are defined in the Exchange Act); and (5) savings
associations (as defined in Section 3(b) of the Federal Deposit Insurance Act),
which, in each case, are members of an approved Signature Guarantee Medallion
Program.

     2.  Delivery of Letter of Transmittal and Share Certificates; Guaranteed
Delivery Procedures.  This Letter of Transmittal is to be completed if share
certificates are to be forwarded herewith or, unless an Agent's Message is
utilized, if delivery of shares is to be made by book-entry transfer pursuant to
the procedures set forth herein and in Section 3 of the Offer to Purchase. For a
shareholder validly to tender shares pursuant to the offer, either (a) a
properly completed and duly executed Letter of Transmittal (or a manually signed
facsimile of the Letter of Transmittal), together with any required signature
guarantees, or an Agent's Message (in connection with a book-entry transfer) and
any other required documents, must be received by the Depositary at one of its
addresses set forth herein prior to the Expiration Date and either (i)
certificates for tendered shares must be received by the Depositary at one of
its addresses prior to the Expiration Date or (ii) shares must be delivered
pursuant to the procedures for book-entry transfer set forth herein and in
Section 3 of the Offer to Purchase and a Book-Entry Confirmation must be
received by the Depositary prior to the Expiration Date or (b) the tendering
shareholder must comply with the guaranteed delivery procedures set forth herein
and in Section 3 of the Offer to Purchase.

     Shareholders whose certificates for shares are not immediately available or
who cannot deliver their certificates and all other required documents to the
Depositary prior to the Expiration Date or who cannot comply with the book-entry
transfer procedures on a timely basis may tender their shares by properly
completing and duly executing the Notice of Guaranteed Delivery pursuant to the
guaranteed delivery procedure set forth below and in Section 3 of the Offer to
Purchase.

     Pursuant to the guaranteed delivery procedures, (a) the tender must be made
by or through an Eligible Institution, (b) a properly completed and duly
executed Notice of Guaranteed Delivery, substantially in the form provided by
Chicago Rivet, must be received by the Depositary prior to the Expiration Date
and (c) the certificates for all tendered shares, in proper form for transfer
(or a Book-Entry Confirmation with respect to all tendered shares), together
with a properly completed and duly executed Letter of Transmittal (or a manually
signed facsimile of the Letter of Transmittal), with any required signature
guarantees, or, in the case of a book-entry transfer, an Agent's Message, and
any other required documents must be received by the Depositary within three
American Stock Exchange trading days after the date of execution of such Notice
of Guaranteed Delivery.

     THE METHOD OF DELIVERY OF ALL DOCUMENTS, INCLUDING CERTIFICATES FOR SHARES,
THE LETTER OF TRANSMITTAL AND ANY OTHER REQUIRED DOCUMENTS IS AT THE ELECTION
AND RISK OF THE TENDERING SHAREHOLDER. THE SHARES WILL BE DEEMED DULY DELIVERED
ONLY WHEN ACTUALLY RECEIVED BY THE DEPOSITARY. IF DELIVERY IS BY MAIL,
REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY INSURED, IS RECOMMENDED.
IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO ENSURE TIMELY DELIVERY.

     3.  Inadequate Space.  If the space provided in the box entitled
"Description of Shares Tendered" above is inadequate, the certificate numbers
and/or the number of shares should be listed on a separate signed schedule and
attached to this Letter of Transmittal.

     4.  Partial Tenders (Not Applicable to Shareholders Who Tender by
Book-Entry Transfer).  If fewer than all of the shares represented by any
certificate are to be tendered, fill in the number of shares that are to be
tendered in the

                                        8
<PAGE>   9

column entitled "Number of Shares Tendered" in the box entitled "Description of
Shares Tendered" above. In that case, if any tendered shares are purchased, a
new certificate for the remainder of the shares evidenced by the old
certificate(s) will be issued and sent to the registered holder(s), unless
otherwise specified in either the box entitled "Special Payment Instructions" or
the box entitled "Special Delivery Instructions" in this Letter of Transmittal,
as soon as practicable after the Expiration Date or termination of the offer.
Unless otherwise indicated, all shares represented by the certificate(s)
delivered to the Depositary will be deemed to have been tendered.

     5.  Indication of Price at Which Shares Are Being Tendered.  For shares to
be validly tendered by this Letter of Transmittal, the shareholder must either:

          (a) check the box under "Shares Tendered at Price Determined Pursuant
     to the Offer"; OR

          (b) check the box indicating the price per share at which the shares
     are being tendered under "Shares Tendered at Price Determined by
     Shareholder."

By checking the box under "Shares Tendered at Price Determined Pursuant to the
Offer" you agree to accept the purchase price determined by Chicago Rivet in
accordance with the terms of the offer, which may be as low as $20.00 or as high
as $23.00 per share. By checking a box under "Shares Tendered at Price
Determined by Shareholder," you acknowledge that doing so could result in none
of the shares being purchased if the purchase price for the shares is less than
the price represented by the box you check. ONLY ONE BOX MAY BE CHECKED. IF MORE
THAN ONE BOX IS CHECKED, OR IF NO BOX IS CHECKED, THERE IS NO VALID TENDER OF
SHARES. A shareholder wishing to tender portions of his or her share holdings at
different prices must complete a separate Letter of Transmittal for each price
at which the shareholder wishes to tender each portion of his or her shares. The
same shares cannot be tendered (unless previously validly withdrawn as provided
in Section 4 of the Offer to Purchase) at more than one price.

     6.  Signatures on Letter of Transmittal; Stock Powers and Endorsements.  If
this Letter of Transmittal is signed by the registered holder(s) of the shares
tendered hereby, the signatures(s) must correspond exactly with the name(s) as
written on the face of the certificates for shares without alteration,
enlargement or any change whatsoever.

     If any of the shares tendered hereby are held of record by two or more
persons, each person must sign this Letter of Transmittal.

     If any of the shares tendered hereby are registered in different names on
different certificates for shares, it will be necessary to complete, sign and
submit as many separate Letters of Transmittal (or copies of the Letter of
Transmittal) as there are different registrations of certificates for shares.

     If this Letter of Transmittal is signed by the registered holder(s) of the
shares tendered hereby, no endorsements of certificates for shares or separate
stock powers are required unless payment of the purchase price is to be made to,
or shares not tendered or not purchased are to be registered in the name of, any
person other than the registered holder(s), in which case the certificate(s) for
shares must be endorsed or accompanied by appropriate stock powers, in either
case signed exactly as the name(s) of the registered holder(s) appear(s) on the
certificates. Signature(s) on any such certificates for shares or stock powers
must be guaranteed by an Eligible Institution. See Instruction 1.

     If this Letter of Transmittal is signed by a person other than the
registered holder(s) of the shares tendered hereby, certificates for such shares
must be endorsed or accompanied by appropriate stock powers, in either case,
signed exactly as the name(s) of the registered holder(s) appear(s) on such
certificate(s). Signature(s) on any such certificates or stock powers must be
guaranteed by an Eligible Institution. See Instruction 1.

     If this Letter of Transmittal or any certificate for shares or stock power
is signed by a trustee, executor, administrator, guardian, attorney-in-fact,
officer of a corporation or other person acting in a fiduciary or representative
capacity, that person should so indicate when signing and must submit proper
evidence satisfactory to Chicago Rivet of the authority of such person so to
act.

     7.  Stock Transfer Taxes.  Except as provided in this Instruction 7, no
stock transfer tax stamps or funds to cover tax stamps need accompany this
Letter of Transmittal. Chicago Rivet will pay or cause to be paid any stock
transfer taxes with respect to the sale and transfer of any shares to it or its
order pursuant to the offer. If, however, payment of the aggregate purchase
price is to be made to, or shares not tendered or not purchased are to be
registered in the name of, any person other than the registered holder(s), or if
such shares are registered in the name of any person other than the

                                        9
<PAGE>   10

person(s) signing this Letter of Transmittal, the amount of any stock transfer
taxes (whether imposed on the registered holder(s), such other person or
otherwise) payable on account of the transfer to such person will be deducted
from the purchase price unless satisfactory evidence of the payment of such
taxes, or exemption therefrom, is submitted. See Section 5 of the Offer to
Purchase.

     8.  Special Payment and Delivery Instructions.  If a check for the purchase
price of any shares tendered hereby is to be issued in the name of, and/or any
shares not tendered or not purchased are to be returned to, a person other than
the person(s) signing this Letter of Transmittal, or if the check and/or any
certificates for shares not tendered or not purchased are to be mailed to
someone other than the person(s) signing this Letter of Transmittal or to an
address other than that shown above in the box captioned "Description of Shares
Tendered," then the boxes captioned "Special Payment Instructions" and/or
"Special Delivery Instructions" on this Letter of Transmittal should be
completed. Shareholders delivering shares by book-entry transfer may request
that shares not accepted for payment be credited to an account maintained at the
Book-Entry Transfer Facility as may be designated by the shareholder in the box
entitled "Special Payment Instructions." If no instructions are given, any
shares not purchased will be returned by crediting the account at the Book-Entry
Transfer Facility designated above as the account from which the shares were
delivered.

     9.  Irregularities.  All questions as to the number of shares to be
accepted, the price to be paid therefor and the validity, form, eligibility
(including time of receipt) and acceptance for payment of any tender of shares
will be determined by Chicago Rivet, in its sole discretion, which determination
will be final and binding on all parties. Chicago Rivet reserves the absolute
right to reject any or all tenders it determines not to be in proper form or the
acceptance of or payment for which may, in the opinion of Chicago Rivet's
counsel, be unlawful. Chicago Rivet also reserves the absolute right to waive
any defect or irregularity in the tender of any particular shares or any
particular shareholder. No tender of shares will be deemed to be validly made
until all defects or irregularities have been cured or waived. None of Chicago
Rivet, the Dealer Manager, the Depositary, the Information Agent or any other
person is or will be obligated to give notice of any defects or irregularities
in tenders, nor will any of them incur any liability for failure to give notice
of any defects or irregularities.

     10.  Order of Purchase in Event of Proration.  As described in Section 1 of
the Offer to Purchase, shareholders may designate the order in which their
shares are to be purchased in the event of proration. The order of purchase may
affect whether any capital gain or loss recognized on such shares purchased is
long-term or short-term (depending on the holding period for such shares) and
the amount of gain or loss recognized for federal income tax purposes. See
Sections 1 and 13 of the Offer to Purchase.

     11.  Lost, Stolen or Destroyed Certificates.  If any certificate
representing shares has been lost, stolen or destroyed, you should notify
Chicago Rivet's transfer agent, First Chicago Trust Company of New York, at
(800)446-2617. You will then be instructed regarding the procedures to be
followed in order to replace the certificate. This Letter of Transmittal and the
related documents cannot be processed until the procedures for replacing lost,
stolen or destroyed certificates have been followed.

     12.  Substitute Form W-9 and Form W-8.  Under the United States federal
income tax backup withholding rules, unless an exemption applies under the
applicable law and regulations, 31% of the gross proceeds payable to a
shareholder or other payee pursuant to the offer must be withheld and remitted
to the United States Treasury, unless the shareholder or other payee provides
such person's taxpayer identification number (employer identification number or
social security number) to the Depositary and certifies that such number is
correct. Therefore, each tendering shareholder should complete and sign the
Substitute Form W-9 included as part of the Letter of Transmittal so as to
provide the information and certification necessary to avoid backup withholding,
unless such shareholder otherwise establishes to the satisfaction of the
Depositary that it is not subject to backup withholding. Certain shareholders
(including, among others, all corporations and certain foreign shareholders (in
addition to foreign corporations)) are not subject to these backup withholding
and reporting requirements. In order for a foreign shareholder to qualify as an
exempt recipient, that shareholder must submit an IRS Form W-8 or a Substitute
Form W-8, signed under penalties of perjury, attesting to that shareholder's
exempt status. Such statements may be obtained from the Depositary.

                                       10
<PAGE>   11

     13.  Withholding on Foreign Shareholders.  Even if a foreign shareholder
has provided the required certification to avoid backup withholding, the
Depositary will withhold United States federal income taxes equal to 30% of the
gross payments payable to a foreign shareholder or his or her agent unless the
Depositary determines that an exemption from or a reduced rate of withholding is
available pursuant to a tax treaty or that an exemption from withholding is
applicable because such gross proceeds are effectively connected with the
conduct of a trade or business in the United States. For this purpose, a foreign
shareholder is a shareholder that is not (i) a citizen or resident of the United
States, (ii) a corporation, partnership or other entity created or organized in
or under the laws of the United States, any state or any political subdivision
thereof, (iii) any estate the income of which is subject to United States
federal income taxation regardless of the source of such income or (iv) a trust
if the administration of the trust is subject to the primary supervision of a
United States Court and one or more United States persons has the authority to
control all substantial decisions of the trust, or if the trust has a valid
election in effect to be treated as United States person. In order to obtain a
reduced rate of withholding pursuant to a tax treaty, a foreign shareholder must
deliver to the Depositary a properly completed IRS Form W-8 BEN. In order to
obtain an exemption from withholding on the grounds that the gross proceeds paid
pursuant to the offer are effectively connected with the conduct of a trade or
business within the United States, a foreign shareholder must deliver to the
Depositary a properly completed IRS Form W-8 ECI. The Depositary will determine
a shareholder's status as a foreign shareholder and eligibility for a reduced
rate of, or an exemption from, withholding by reference to outstanding
certificates or statements concerning eligibility for a reduced rate of, or
exemption from, withholding (e.g., IRS Form W-8 BEN or IRS Form W-8 ECI) unless
facts and circumstances indicate that such reliance is not warranted. A foreign
shareholder may be eligible to obtain a refund of all or a portion of any tax
withheld if such shareholder meets the "complete redemption," "substantially
disproportionate" or "not essentially equivalent to a dividend" test described
in Section 13 of the Offer to Purchase or is otherwise able to establish that no
tax or a reduced amount of tax is due. Backup withholding generally will not
apply to amounts subject to the 30% or treaty-reduced rate of withholding.
Foreign shareholders are urged to consult their tax advisors regarding the
application of United States federal income tax withholding, including
eligibility for a withholding tax reduction or exemption and refund procedures.

     14.  Requests for Assistance or Additional Copies.  Any questions or
requests for assistance or additional copies of the Offer to Purchase, this
Letter of Transmittal and other tender offer materials may be directed to the
Information Agent at its telephone number and address listed below.

IMPORTANT: THIS LETTER OF TRANSMITTAL (OR A MANUALLY SIGNED FACSIMILE OF THIS
LETTER OF TRANSMITTAL) TOGETHER WITH ANY REQUIRED SIGNATURE GUARANTEES, OR, IN
THE CASE OF A BOOK-ENTRY TRANSFER, AN AGENT'S MESSAGE, AND ANY OTHER REQUIRED
DOCUMENTS, MUST BE RECEIVED BY THE DEPOSITARY PRIOR TO THE EXPIRATION DATE AND
EITHER CERTIFICATES FOR TENDERED SHARES MUST BE RECEIVED BY THE DEPOSITARY OR
SHARES MUST BE DELIVERED PURSUANT TO THE PROCEDURES FOR BOOK-ENTRY TRANSFER, IN
EACH CASE PRIOR TO THE EXPIRATION DATE, OR THE TENDERING SHAREHOLDER MUST COMPLY
WITH THE PROCEDURES FOR GUARANTEED DELIVERY.

                                       11
<PAGE>   12

                 PAYER'S NAME: HARRIS TRUST COMPANY OF NEW YORK
- --------------------------------------------------------------------------------

<TABLE>
<S>                             <C>                                               <C>
SUBSTITUTE                       PART I -- Taxpayer Identification Number -- For      -------------------------------
FORM W-9                         all accounts, enter your TIN in the box at               Social Security Number
DEPARTMENT OF THE TREASURY       right. (For most individuals, this is your                         OR
INTERNAL REVENUE SERVICE         social security number. If you do not have a
                                 TIN, see Obtaining a Number in the enclosed          -------------------------------
PAYER'S REQUEST FOR TAXPAYER     Guidelines.) Certify by signing and dating           Employer Identification Number
IDENTIFICATION NUMBER ("TIN")    below. Note: If the account is in more than one   (If awaiting TIN write "Applied For")
                                 name, see the chart in the enclosed Guidelines
                                 to determine which number to give the payer.
                                ----------------------------------------------------------------------------------------
                                 PART II -- For Payees Exempt from backup Withholding, see the enclosed Guidelines and
                                 complete as instructed therein.
- -------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<S>                                  <C>
CERTIFICATION -- Under penalties of perjury, I certify that:
(1) The number shown on this form is my correct Taxpayer Identification Number (or I am waiting for a number to be issued
to me), and
(2) I am not subject to backup withholding either because (a) I am exempt from backup withholding, (b) I have not been
    notified by the Internal Revenue Service (the "IRS") that I am subject to backup withholding as a result of failure
    to report all interest or dividends, or (c) the IRS has notified me that I am no longer subject to backup
    withholding.
CERTIFICATE INSTRUCTIONS -- You must cross out item (2) above if you have been notified by the IRS that you are subject
to backup withholding because of underreporting interest or dividends on your tax return. However, if after being
notified by the IRS that you were subject to backup withholding you received another notification from the IRS that you
are no longer subject to backup withholding, do not cross out item (2). (Also see instructions in the enclosed
Guidelines.)

- -------------------------------------------------------------------------------------------------------------------------
 Signature  Date ____________ , 2000
- -------------------------------------------------------------------------------------------------------------------------
</TABLE>

- --------------------------------------------------------------------------------

             CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER

     I certify under penalties of perjury that a taxpayer identification number
 has not been issued to me, and either (1) I have mailed or delivered an
 application to receive a taxpayer identification number to the appropriate
 Internal Revenue Service Center or Social Security Administration Office or
 (2) I intend to mail or deliver an application in the near future. I
 understand that if I do not provide a taxpayer identification number by the
 time of payment, 31% of all reportable payments made to me thereafter will be
 withheld until I provide a number.

 --------------------------------------------------------------
 --------------------------------------------------------------
               Signature                                  Date
- --------------------------------------------------------------------------------

NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP WITHHOLDING
      OF 31% OF ANY CASH PAYMENTS.

      THE IRS DOES NOT REQUIRE YOUR CONSENT TO ANY PROVISION OF THIS DOCUMENT
      OTHER THAN THE CERTIFICATION REQUIRED TO AVOID BACKUP WITHHOLDING.

      PLEASE REVIEW ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER
      IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.

                    The Information Agent for the offer is:

                           Georgeson Shareholder Logo

                   GEORGESON SHAREHOLDER COMMUNICATIONS INC.
                         17 State Street -- 10th Floor
                            New York, New York 10004

                 Banks and Brokers call collect: (212) 440-9800
                   All Others Call Toll Free: (800) 223-2064

                      The Dealer Manager for the offer is:

                             BMO Nesbitt Burns Logo

                            BMO NESBITT BURNS CORP.
                       111 West Monroe Street, 20th Floor
                            Chicago, Illinois 60603

                           Toll Free: (877) 377-3317
                                       12

<PAGE>   1

                          CHICAGO RIVET & MACHINE CO.

                         NOTICE OF GUARANTEED DELIVERY
                                      FOR
                        TENDER OF SHARES OF COMMON STOCK
           (INCLUDING THE ASSOCIATED PREFERRED STOCK PURCHASE RIGHTS)
                   (NOT TO BE USED FOR SIGNATURE GUARANTEES)

     This form, or a form substantially equivalent to this form, must be used to
accept the offer set forth in the Offer to Purchase, dated March 16, 2000, and
the related Letter of Transmittal which, as amended from time to time, together
constitute the offer by Chicago Rivet & Machine Co., an Illinois corporation, to
purchase up to 225,000 shares of its common stock, par value $1.00 per share, at
a price not greater than $23.00 nor less than $20.00 per share, net to the
seller in cash, specified by tendering shareholders, upon the terms and subject
to the conditions contained in the Offer to Purchase.

     The offer will expire at 5:00 P.M., New York City time, on Friday, April
14, 2000, unless the offer is extended (as it may be extended, the "Expiration
Date"). As described in the Offer to Purchase, if you desire to tender your
shares and (1) certificates for your shares cannot be delivered to the
Depositary (as defined below) prior to the Expiration Date; or (2) the procedure
for book-entry transfer (set forth in Section 3 of the Offer to Purchase) cannot
be completed on a timely basis; or (3) the Letter of Transmittal and all other
required documents cannot be delivered to the Depositary prior to the Expiration
Date, you may tender your shares by following the procedures described in
Section 3 of the Offer to Purchase, including completion of this Notice of
Guaranteed Delivery. See Section 3 of the Offer to Purchase.

 IF TENDER IS NOT BEING MADE IN THE METHOD SET FORTH ABOVE, THEN THIS FORM NEED
                               NOT BE COMPLETED.

                        The Depositary for the offer is:

                        HARRIS TRUST COMPANY OF NEW YORK

<TABLE>
<S>                            <C>                             <C>
          By Mail:               By Facsimile Transmission:    By Hand or Overnight Courier:
     Wall Street Station                                              Receive Window
        P.O. Box 1023                  (212) 701-7636                Wall Street Plaza
   New York, NY 10268-1023                                      88 Pine Street, 19th Floor
                               Confirm Facsimile Transmission       New York, NY 10005
                                by Telephone: (800) 245-7630
</TABLE>

DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS, OR TRANSMISSION OF
INSTRUCTIONS VIA A FACSIMILE NUMBER, OTHER THAN AS SET FORTH ABOVE WILL NOT
CONSTITUTE A VALID DELIVERY. DELIVERIES TO CHICAGO RIVET WILL NOT BE FORWARDED
TO THE DEPOSITARY AND THEREFORE WILL NOT CONSTITUTE VALID DELIVERY. DELIVERIES
TO THE BOOK-ENTRY TRANSFER FACILITY WILL NOT CONSTITUTE VALID DELIVERIES TO THE
DEPOSITARY.

THIS FORM IS NOT TO BE USED TO GUARANTEE SIGNATURES. IF A SIGNATURE ON A LETTER
OF TRANSMITTAL IS REQUIRED TO BE GUARANTEED BY AN ELIGIBLE INSTITUTION (AS
DEFINED IN THE OFFER TO PURCHASE) UNDER THE INSTRUCTIONS TO THE LETTER OF
TRANSMITTAL, THE SIGNATURE GUARANTEE MUST APPEAR IN THE APPLICABLE SPACE
PROVIDED IN THE SIGNATURE BOX ON THE LETTER OF TRANSMITTAL.

THE ELIGIBLE INSTITUTION THAT COMPLETES THIS FORM MUST COMMUNICATE THE GUARANTEE
TO THE DEPOSITARY AND MUST DELIVER THE LETTER OF TRANSMITTAL AND CERTIFICATES
FOR SHARES TO THE DEPOSITARY WITHIN THE TIME SHOWN HEREIN. FAILURE TO DO SO
COULD RESULT IN A FINANCIAL LOSS TO SUCH ELIGIBLE INSTITUTION.
<PAGE>   2

Ladies and Gentlemen:

     The undersigned hereby tenders to Chicago Rivet at the price per share
indicated in this Notice of Guaranteed Delivery, upon the terms and subject to
the conditions described in the Offer to Purchase and the related Letter of
Transmittal, receipt of which is hereby acknowledged, the number of shares
specified below pursuant to the guaranteed delivery procedure set forth in
Section 3 of the Offer to Purchase. The undersigned understands that a tender of
shares will include a tender of the associated preferred stock purchase rights
issued pursuant to the Rights Agreement, dated as of November 22, 1999, between
Chicago Rivet and First Chicago Trust Company of New York, as rights agent, and
that no separate consideration will be paid for the preferred stock purchase
rights. For a description of the rights, see Section 7 of the Offer to Purchase.
Unless the context otherwise requires, all references to shares shall include
the associated preferred stock purchase rights.

<TABLE>
<S>                                             <C>

Number of Shares:                               Name(s)
- -----------------------------------------       -----------------------------------------
- -----------------------------------------       -----------------------------------------
                                                (PLEASE PRINT)
Certificate Nos: (if available)
- -----------------------------------------       Address(es):
                                                ------------------------------------
[ ] Check here if shares will be tendered       -----------------------------------------
    by book-entry transfer and complete         (INCLUDING ZIP CODE)
    the following:
                                                Area Code and Tel. No.
Name of Tendering Institution:                  ------------------------
- -----------------------------------------
                                                Signature(s)
Account No.:                                    ------------------------------------
- ------------------------------------            -----------------------------------------
</TABLE>

                                        2
<PAGE>   3

                          PRICE (IN DOLLARS) PER SHARE
                                AT WHICH SHARES
                               ARE BEING TENDERED

              IF SHARES ARE BEING TENDERED AT MORE THAN ONE PRICE,
           A SEPARATE LETTER OF TRANSMITTAL FOR EACH PRICE SPECIFIED
                                 MUST BE USED.

            CHECK ONLY ONE BOX. IF MORE THAN ONE BOX IS CHECKED, OR
           IF NO BOX IS CHECKED, THERE IS NO VALID TENDER OF SHARES.
- --------------------------------------------------------------------------------

                            SHARES TENDERED AT PRICE
                        DETERMINED PURSUANT TO THE OFFER

[ ]  The undersigned wants to maximize the chance of having Chicago Rivet
     purchase all the shares the undersigned is tendering (subject to the
     possibility of proration). Accordingly, by checking this ONE box INSTEAD OF
     ONE OF THE PRICE BOXES BELOW, the undersigned hereby tenders shares and is
     willing to accept the purchase price determined by the Chicago Rivet in
     accordance with the terms of the offer. This action will result in
     receiving a price per share as low as $20.00 or as high as $23.00.

          ------------------------------------------------------------

                                       OR

          ------------------------------------------------------------

                                SHARES TENDERED
                       AT PRICE DETERMINED BY SHAREHOLDER

By checking ONE of the boxes below INSTEAD OF THE BOX ABOVE, the undersigned
hereby tenders shares at the price checked. This action could result in none of
the shares being purchased if the purchase price for the shares is less than the
price checked. A shareholder who desires to tender shares at more than one price
must complete a separate Letter of Transmittal for each price at which shares
are tendered. THE SAME SHARES CANNOT BE TENDERED AT MORE THAN ONE PRICE. If more
than one box is checked, or if no box is checked, there is no valid tender of
shares.

        Price (in dollars) per share at which shares are being tendered:

<TABLE>
<S>           <C>           <C>           <C>
[ ] 20.000    [ ] 20.875    [ ] 21.750    [ ] 22.625
[ ] 20.125    [ ] 21.000    [ ] 21.875    [ ] 22.750
[ ] 20.250    [ ] 21.125    [ ] 22.000    [ ] 22.875
[ ] 20.375    [ ] 21.250    [ ] 22.125    [ ] 23.000
[ ] 20.500    [ ] 21.375    [ ] 22.250
[ ] 20.625    [ ] 21.500    [ ] 22.375
[ ] 20.750    [ ] 21.625    [ ] 22.500
</TABLE>

                                        3
<PAGE>   4

               GUARANTEE (NOT TO BE USED FOR SIGNATURE GUARANTEE)

     The undersigned, an Eligible Institution (as defined in the Offer to
Purchase) hereby guarantees to deliver to the Depositary at one of its addresses
set forth above the certificates for all tendered shares in proper form for
transfer (or Book Entry Confirmation (as defined in the Offer to Purchase)),
together with a properly completed and duly executed Letter of Transmittal (or
manually signed copy thereof) and any required signature guarantees, or an
Agent's Message (as defined in the Offer to Purchase) with a book-entry
transfer, and any other documents required by the Letter of Transmittal, all
within three American Stock Exchange trading days after the date hereof.

     The Eligible Institution that completes this form must communicate the
guarantee to the Depositary and must deliver the Letter of Transmittal and
certificates for shares to the Depositary within the time shown herein. Failure
to do so could result in a financial loss to such Eligible Institution.

<TABLE>
<S>                                                  <C>

- ---------------------------------------------------  ---------------------------------------------------
Name of Firm                                         Authorized Signature
- ---------------------------------------------------  ---------------------------------------------------
Address                                              Name
- ---------------------------------------------------  ---------------------------------------------------
City, State, Zip Code                                Title
- ---------------------------------------------------
Area Code and Telephone Number

                                      Dated:                , 2000
</TABLE>

           NOTE: DO NOT SEND CERTIFICATES FOR SHARES WITH THIS FORM.
         YOUR CERTIFICATES MUST BE SENT WITH THE LETTER OF TRANSMITTAL.

                                        4

<PAGE>   1

                             BMO Nesbitt Burns Logo

                          CHICAGO RIVET & MACHINE CO.

                        OFFER TO PURCHASE FOR CASH UP TO
                       225,000 SHARES OF ITS COMMON STOCK
           (INCLUDING THE ASSOCIATED PREFERRED STOCK PURCHASE RIGHTS)
                  AT A PURCHASE PRICE NOT GREATER THAN $23.00
                         NOR LESS THAN $20.00 PER SHARE

     THE OFFER, PRORATION PERIOD AND WITHDRAWAL RIGHTS EXPIRE AT 5:00 P.M., NEW
YORK CITY TIME, ON FRIDAY, APRIL 14, 2000, UNLESS THE OFFER IS EXTENDED.

                                                                  March 16, 2000

To Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees:

     Chicago Rivet & Machine Co., an Illinois corporation, has engaged us to act
as Dealer Manager in connection with its offer to purchase shares of its common
stock, par value $1.00 per share. Chicago Rivet is offering to purchase up to
225,000 shares at a price not greater than $23.00 nor less than $20.00 per share
in cash, as specified by tendering shareholders.

     Chicago Rivet's offer is being made upon the terms and subject to the
conditions set forth in this Offer to Purchase and the related Letter of
Transmittal which, as amended from time to time, together constitute the offer.
A tender of shares pursuant to the offer will include the associated preferred
stock purchase rights issued pursuant to the Rights Agreement, dated as of
November 22, 1999, between Chicago Rivet and First Chicago Trust Company of New
York, as rights agent, and unless the context requires otherwise, all references
to shares includes the associated preferred stock purchase rights.

     Chicago Rivet will determine a single per share purchase price, net to the
seller in cash, without interest, that it will pay for validly tendered shares,
taking into account the number of shares tendered and the prices specified by
tendering shareholders. Chicago Rivet will select the lowest purchase price that
will allow it to buy 225,000 shares validly tendered or, if a lesser number of
shares are validly tendered, all shares that are validly tendered.

     Chicago Rivet will pay the purchase price for all shares validly tendered
at prices at or below the purchase price and not withdrawn. However, because of
the proration provisions described in the offer, all shares tendered at or below
the purchase price will not be purchased if the offer is oversubscribed. Chicago
Rivet will return at its own expense all shares not purchased pursuant to the
offer, including shares tendered at prices greater than the purchase price and
shares not purchased because of proration.

     Chicago Rivet reserves the right, in its sole discretion, to purchase more
than 225,000 shares pursuant to the offer.

     The offer is not conditioned on any minimum number of shares being
tendered. The offer is, however, subject to certain other conditions. See
Section 6 of the Offer to Purchase.

     If, before the offer expires, more than 225,000 shares or such greater
number of shares as Chicago Rivet may elect to purchase are validly tendered at
or below the purchase price and not withdrawn, Chicago Rivet will purchase
shares on a pro rata basis from all shareholders who validly tender shares at
prices at or below the purchase price.
<PAGE>   2

     For your information and for forwarding to your clients, we are enclosing
the following documents:

          l.  The Offer to Purchase.

          2.  A letter to shareholders of Chicago Rivet from the Chairman of the
     Board and Chief Executive Officer of Chicago Rivet.

          3.  The Letter of Transmittal for your use and for the information of
     your clients.

          4.  The Notice of Guaranteed Delivery to be used to accept the offer
     if none of the procedures for tendering shares described in the Offer to
     Purchase can be completed on a timely basis.

          5.  A letter that may be sent to your clients for whose accounts you
     hold shares registered in your name or in the name of your nominee, with
     space for obtaining such clients' instructions with regard to the offer.

          6.  Guidelines for Certification for Taxpayer Identification Number on
     Substitute Form W-9.

          7.  A return envelope addressed to Harris Trust Company of New York,
     the Depositary.

     WE URGE YOU TO CONTACT YOUR CLIENTS AS PROMPTLY AS POSSIBLE. PLEASE NOTE
THAT THE OFFER, PRORATION PERIOD AND WITHDRAWAL RIGHTS EXPIRE AT 5:00 P.M., NEW
YORK CITY TIME, ON FRIDAY, APRIL 14, 2000, UNLESS THE OFFER IS EXTENDED.

     Chicago Rivet will not pay any fees or commissions to any broker, dealer or
other person for soliciting tenders of shares pursuant to the offer (other than
BMO Nesbitt Burns Corp., as the Dealer Manager, and Georgeson Shareholder
Communications Inc., as the Information Agent). Chicago Rivet will, upon
request, reimburse you for the reasonable and customary handling and mailing
expenses you incur in forwarding materials relating to the offer to your
clients. Chicago Rivet will pay all stock transfer taxes applicable to its
purchase of shares pursuant to the offer, except as otherwise provided in the
Letter of Transmittal.

     In order to take advantage of the offer, a shareholder must complete and
sign the Letter of Transmittal or a copy of the Letter of Transmittal in
accordance with the instructions in the Letter of Transmittal and either mail or
deliver it with any required signature guarantee or, in the case of book-entry
transfer, deliver an Agent's Message (as defined in the Offer to Purchase), and
any other required documents to Harris Trust Company of New York, the
Depositary, and either mail or deliver the stock certificates for the shares or
tender the shares pursuant to the procedures for book-entry transfer described
in the Offer to Purchase and Letter of Transmittal. Any shareholder who desires
to tender shares and whose certificates for the shares are not immediately
available or who cannot comply with the procedure for book-entry transfer on a
timely basis or whose other required documents cannot be delivered to the
Depositary by the expiration of the offer should tender the shares by following
the procedures for guaranteed delivery set forth in Section 3 of the Offer to
Purchase.

     Any questions or requests for assistance or additional copies of the
enclosed materials may be directed to Georgeson Shareholder Communications Inc.,
the Information Agent, or BMO Nesbitt Burns Corp., the Dealer Manager, at their
respective addresses and telephone numbers set forth on the back cover of the
enclosed Offer to Purchase.

                                          Very truly yours,

                                          BMO Nesbitt Burns Corp.

     NOTHING CONTAINED IN THIS DOCUMENT OR IN THE ENCLOSED DOCUMENTS WILL MAKE
YOU OR ANY OTHER PERSON THE AGENT OF CHICAGO RIVET, THE DEALER MANAGER, THE
INFORMATION AGENT OR THE DEPOSITARY OR ANY AFFILIATE OF ANY OF THE FOREGOING, OR
AUTHORIZE YOU OR ANY OTHER PERSON TO USE ANY DOCUMENT OR MAKE ANY STATEMENT ON
BEHALF OF ANY OF THEM IN CONNECTION WITH THE OFFER EXCEPT THE STATEMENTS
EXPRESSLY MADE IN THE OFFER TO PURCHASE AND THE LETTER OF TRANSMITTAL.

                                        2

<PAGE>   1

                               Chicago Rivet Logo
                        OFFER TO PURCHASE FOR CASH UP TO
                       225,000 SHARES OF ITS COMMON STOCK
           (INCLUDING THE ASSOCIATED PREFERRED STOCK PURCHASE RIGHTS)
                  AT A PURCHASE PRICE NOT GREATER THAN $23.00
                         NOR LESS THAN $20.00 PER SHARE

     THE OFFER, PRORATION PERIOD AND WITHDRAWAL RIGHTS EXPIRE AT 5:00 P.M., NEW
YORK CITY TIME, ON FRIDAY, APRIL 14, 2000, UNLESS THE OFFER IS EXTENDED.

                                                                  March 16, 2000
To Our Clients:

     Enclosed for your consideration are the Offer to Purchase, dated March 16,
2000, and the related Letter of Transmittal in connection with the offer by
Chicago Rivet & Machine Co., an Illinois corporation, to purchase shares of its
common stock, par value $1.00 per share. Chicago Rivet is offering to purchase
up to 225,000 shares at a price not greater than $23.00 nor less than $20.00 per
share in cash, as specified by tendering shareholders.

     Chicago Rivet's offer is being made upon the terms and subject to the
conditions set forth in this Offer to Purchase and the related Letter of
Transmittal which, as amended from time to time, together constitute the offer.
A tender of shares pursuant to the offer will include the associated preferred
stock purchase rights issued pursuant to the Rights Agreement, dated as of
November 22, 1999, between Chicago Rivet and First Chicago Trust Company of New
York, as rights agent, and unless the context requires otherwise, all references
to shares includes the associated preferred stock purchase rights.

     Chicago Rivet will determine a single per share purchase price, net to the
seller in cash, without interest, that it will pay for validly tendered shares,
taking into account the number of shares tendered and the prices specified by
tendering shareholders. Chicago Rivet will select the lowest purchase price that
will allow it to buy 225,000 shares validly tendered or, if a lesser number of
shares are validly tendered, all shares that are validly tendered.

     Chicago Rivet will pay the purchase price for all shares validly tendered
at prices at or below the purchase price and not withdrawn. However, because of
the proration provisions described in the offer, all shares tendered at or below
the purchase price will not be purchased if the offer is oversubscribed. Chicago
Rivet will return at its own expense all shares not purchased pursuant to the
offer, including shares tendered at prices greater than the purchase price and
shares not purchased because of proration.

     Chicago Rivet reserves the right, in its sole discretion, to purchase more
than 225,000 shares pursuant to the offer.

     The offer is not conditioned on any minimum number of shares being
tendered. The offer is, however, subject to certain other conditions. See
Section 6 of the Offer to Purchase.

     If, before the offer expires, more than 225,000 shares or such greater
number of shares as Chicago Rivet may elect to purchase, are validly tendered at
or below the purchase price and not withdrawn, Chicago Rivet will purchase
shares on a pro rata basis from all shareholders who validly tender shares at
prices at or below the purchase price.

     WE ARE THE HOLDER OF RECORD OF SHARES HELD FOR YOUR ACCOUNT. ACCORDINGLY, A
TENDER OF SHARES CAN BE MADE ONLY BY US AS THE HOLDER OF RECORD AND PURSUANT TO
YOUR INSTRUCTIONS. THE LETTER OF TRANSMITTAL IS FURNISHED TO YOU FOR YOUR
INFORMATION ONLY AND CANNOT BE USED BY YOU TO TENDER SHARES HELD BY US FOR YOUR
ACCOUNT.
<PAGE>   2

     We request instructions as to whether you wish us to tender any or all of
the shares held by us for your account, upon the terms and subject to the
conditions set forth in the Offer to Purchase and the Letter of Transmittal.

     Your attention is invited to the following:

          1. You may tender shares at either the price determined by you (in
     multiples of $.125), not greater than $23.00 nor less than $20.00 per
     share, or the price determined by Chicago Rivet in accordance with the
     terms of the offer as indicated in the attached Instruction Form, net to
     you in cash, without interest.

          2. The offer is for up to 225,000 shares, constituting approximately
     19.8% of the total shares outstanding as of March 15, 2000. The offer is
     not conditioned on any minimum number of shares being tendered. The offer
     is, however, subject to certain other conditions set forth in the Offer to
     Purchase.

          3. The offer, proration period and withdrawal rights will expire at
     5:00 P.M., New York City time, on Friday, April 14, 2000, unless the offer
     is extended (as it may be extended, the "Expiration Date"). Your
     instructions to us should be forwarded to us in ample time to permit us to
     submit a tender on your behalf.

          4. As described in the Offer to Purchase, if more than 225,000 shares
     have been validly tendered at or below the purchase price and not withdrawn
     prior to the Expiration Date, as defined in Section 1 of the Offer to
     Purchase, the shares will be subject to proration.

          5. The Board of Directors of Chicago Rivet has unanimously approved
     the making of the offer. However, you must make your own decision whether
     to tender your shares and, if so, how many shares to tender and the price
     or prices at which you will tender them. Neither Chicago Rivet nor its
     Board of Directors makes any recommendation to any shareholder as to
     whether to tender or refrain from tendering shares or as to the price at
     which you may tender your shares.

          6. Tendering shareholders who hold shares registered in their own name
     and who tender their shares directly to the Depositary will not be
     obligated to pay brokerage commissions or solicitation fees. Any stock
     transfer taxes applicable to the purchase of shares by Chicago Rivet
     pursuant to the offer will be paid by Chicago Rivet, except as otherwise
     provided in Instruction 7 of the Letter of Transmittal.

          7. If you wish to tender portions of your shares at different prices
     you must complete a separate Instruction Form for each price at which you
     wish to tender each portion of your shares. We must submit separate Letters
     of Transmittal on your behalf for each price you will accept. THE SAME
     SHARES CANNOT BE TENDERED AT MORE THAN ONE PRICE.

     If you wish to have us tender any or all of your shares, held by us for
your account upon the terms and subject to the conditions set forth in the Offer
to Purchase, please instruct us by completing, executing and returning to us the
attached Instruction Form. An envelope to return your instructions to us is
enclosed. If you authorize the tender of your shares, all shares will be
tendered unless otherwise specified on the Instruction Form. YOUR INSTRUCTIONS
SHOULD BE FORWARDED TO US IN AMPLE TIME TO PERMIT US TO SUBMIT A TENDER ON YOUR
BEHALF PRIOR TO THE EXPIRATION OF THE OFFER.

     The offer is being made to all holders of shares. Chicago Rivet is not
aware of any jurisdiction where the making of the offer is not in compliance
with applicable law. If Chicago Rivet becomes aware of any jurisdiction where
the making of the offer is not in compliance with any valid applicable law,
Chicago Rivet will make a good faith effort to comply with the applicable law.
If, after such good faith effort, Chicago Rivet cannot comply with the law, the
offer will not be made to (nor will tenders be accepted from or on behalf of)
the holders of shares residing in that jurisdiction. In any jurisdiction the
securities or blue sky laws of which require the offer to be made by a licensed
broker or dealer, the offer is being made on Chicago Rivet's behalf by the
Dealer Manager or one or more registered brokers or dealers licensed under the
laws of that jurisdiction.

                                        2
<PAGE>   3

                                INSTRUCTION FORM

               INSTRUCTIONS FOR TENDER OF SHARES OF CHICAGO RIVET

     Please tender to Chicago Rivet, on (our) (my) behalf, the number of shares
indicated below (or if no number is indicated below, all shares) which are
beneficially owned by (us) (me) and registered in your name, upon the terms and
subject to the conditions of Offer to Purchase and related Letter of
Transmittal, the receipt of which is hereby acknowledged.

                                SHARES TENDERED

[ ]  If fewer than all shares are to be tendered, please check the box and
     indicate below the aggregate number of shares to be tendered by us.

                     ------------------------------ shares

Unless otherwise indicated, it will be assumed that all shares held by us for
your account are to be tendered.

                                        3
<PAGE>   4

                          PRICE (IN DOLLARS) PER SHARE
                                AT WHICH SHARES
                               ARE BEING TENDERED

              IF SHARES ARE BEING TENDERED AT MORE THAN ONE PRICE,
              A SEPARATE INSTRUCTION FORM FOR EACH PRICE SPECIFIED
                                 MUST BE USED.

            CHECK ONLY ONE BOX. IF MORE THAN ONE BOX IS CHECKED, OR
           IF NO BOX IS CHECKED, THERE IS NO VALID TENDER OF SHARES.

- --------------------------------------------------------------------------------

                            SHARES TENDERED AT PRICE
                        DETERMINED PURSUANT TO THE OFFER

[ ]  The undersigned wants to maximize the chance of having Chicago Rivet
     purchase all the shares the undersigned is tendering (subject to the
     possibility of proration). Accordingly, by checking this ONE box INSTEAD OF
     ONE OF THE PRICE BOXES BELOW, the undersigned hereby tenders shares and is
     willing to accept the purchase price determined by the Chicago Rivet in
     accordance with the terms of the offer. This action will result in
     receiving a price per share as low as $20.00 or as high as $23.00.

          ------------------------------------------------------------

                                       OR

          ------------------------------------------------------------

                                SHARES TENDERED
                       AT PRICE DETERMINED BY SHAREHOLDER

By checking ONE of the boxes below INSTEAD OF THE BOX ABOVE, the undersigned
hereby tenders shares at the price checked. This action could result in none of
the shares being purchased if the purchase price for the shares is less than the
price checked. A shareholder who desires to tender shares at more than one price
must complete a separate Instruction Form for each price at which shares are
tendered. THE SAME SHARES CANNOT BE TENDERED AT MORE THAN ONE PRICE. If more
than one box is checked, or if no box is checked, there is no valid tender of
shares.

        Price (in dollars) per share at which shares are being tendered:

<TABLE>
<S>           <C>           <C>           <C>
[ ] 20.000    [ ] 20.875    [ ] 21.750    [ ] 22.625
[ ] 20.125    [ ] 21.000    [ ] 21.875    [ ] 22.750
[ ] 20.250    [ ] 21.125    [ ] 22.000    [ ] 22.875
[ ] 20.375    [ ] 21.250    [ ] 22.125    [ ] 23.000
[ ] 20.500    [ ] 21.375    [ ] 22.250
[ ] 20.625    [ ] 21.500    [ ] 22.375
[ ] 20.750    [ ] 21.625    [ ] 22.500
</TABLE>

                                        4
<PAGE>   5

     The method of delivery of this document is at the option and risk of the
tendering shareholder. If delivery is by mail, registered mail with return
receipt requested, properly insured, is recommended. In all cases, sufficient
time should be allowed to assure delivery.

Sign Here
- --------------------------------------------------------------------------------
          ----------------------------------------------------------------------
                                       SIGNATURE(S)

Names(s)
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                             (PLEASE PRINT NAME(S))

Address(es)
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                               (INCLUDE ZIP CODE)
Dated:                       , 2000
- ---------------------------------------------------------
                                  TAX IDENTIFICATION OR SOCIAL SECURITY
                                                    NUMBER(S)

                                        5

<PAGE>   1

            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                      NUMBER (TIN) ON SUBSTITUTE FORM W-9
             (SECTION REFERENCES ARE TO THE INTERNAL REVENUE CODE)

NAME
If you are an individual, you must generally provide the name shown on your
social security card. However, if you have changed your last name, for instance,
due to marriage, without informing the Social Security Administration of the
name change, please enter your first name, the last name shown on your social
security card, and your new last name.

OBTAINING A NUMBER
If you don't have a taxpayer identification number ("TIN"), apply for one
immediately. To apply, obtain Form SS-5, Application for a Social Security Card,
from your local office of the Social Security Administration, or Form SS-4,
Application for Employer Identification Number, from your local Internal Revenue
Service (the "IRS") office.

PAYEES AND PAYMENTS EXEMPT FROM BACKUP WITHHOLDING
The following is a list of payees exempt from backup withholding and for which
no information reporting is required:
   (1) An organization exempt from tax under section 501(a), or an individual
       retirement plan ("IRA"), or a custodial account under section 403(b)(7).

   (2) The United States or any of its agencies or instrumentalities.

   (3) A state, the District of Columbia, a possession of the United States, or
       any of their political subdivisions or instrumentalities.

   (4) A foreign government or any of its political subdivisions, agencies or
       instrumentalities.

   (5) An international organization or any of its agencies or
       instrumentalities.

  Other payees that may be exempt from backup withholding include:

   (6) A corporation.

   (7) A foreign central bank of issue.

   (8) A dealer in securities or commodities required to register in the U.S. or
       a possession of the U.S.

   (9) A futures commission merchant registered with the Commodity Futures
       Trading Commission.

  (10) A real estate investment trust.

  (11) An entity registered at all times during the tax year under the
       Investment Company Act of 1940.

  (12) A common trust fund operated by a bank under section 584(a).

  (13) A financial institution.

  (14) A middleman known in the investment community as a nominee or listed in
       the most recent publication of the American Society of Corporate
       Secretaries, Inc., Nominee List.

  (15) A trust exempt from tax under section 664 or described in section 4947.

  For interest and dividends, all listed payees are exempt except item (9). For
broker transactions, payees listed in (1) through (13) and a person registered
under the Investment Advisers Act of 1940 who regularly acts as a broker are
exempt. Payments subject to reporting under sections 6041 and 6041A are
generally exempt from backup withholding only if made to payees described in
items (1) through (7), except the following payments made to a corporation and
reportable on Form 1099-MISC are not exempt from withholding:
  - Medical and health care payments.

  - Attorneys' fees.

  - Payments for services paid by a federal executive agency.

  Payments of dividends generally not subject to backup withholding include the
following:

  - Payments to nonresident aliens subject to withholding under section 1441.

  - Payments to partnerships not engaged in a trade or business in the U.S. and
    that have at least one nonresident partner.

  - Payments made by certain foreign organizations.

  Payments of interest generally not subject to backup withholding include the
following:

  - Payments of interest on obligations issued by individuals.

    Note:  You may be subject to backup withholding if this interest is $600 or
    more and is paid in the course of the payor's trade or business and you have
    not provided your correct TIN to the payor.

  - Payments of tax-exempt interest (including exempt-interest dividends under
    section 852).

  - Payments described in section 6049(b)(5) to nonresident aliens.

  - Payments on tax-free covenant bonds under section 1451.

  - Payments made by certain foreign organizations.

  - Mortgage interest paid by you.

  Payments that are not subject to information reporting are also not subject to
backup withholding. For details, see sections 6041, 6041A, 6042, 6044, 6045,
6049, 6050A, and 6050N, and the regulations under those sections.

PRIVACY ACT NOTICE.--Section 6109 requires you to furnish your correct TIN to
persons who must file information returns with the IRS to report interest,
dividends, and certain other income paid to you, mortgage interest you paid, the
acquisition or abandonment of secured property, or contributions you made to an
IRA. The IRS uses the numbers for identification purposes and to help verify the
accuracy of your tax return. You must provide your TIN whether or not you are
qualified to file a tax return. Payers must generally withhold 31% of taxable
interest, dividend and certain other payments to a payee who does not furnish a
TIN to a payor. Certain penalties may also apply.

PENALTIES

(1)  FAILURE TO FURNISH TIN.--If you fail to furnish your correct TIN to a
requester (the person asking you to furnish your TIN), you are subject to a
penalty of $50 for each such failure unless your failure is due to reasonable
cause and not to wilful neglect.

(2)  CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING.--If you
made a false statement with no reasonable basis that results in no backup
withholding, you are subject to a $500 penalty.

(3)  CRIMINAL PENALTY FOR FALSIFYING INFORMATION.--Willfully falsifying
certifications or affirmations may subject you to criminal penalties including
fines and/or imprisonment.

                  FOR ADDITIONAL INFORMATION CONTACT YOUR TAX
                             CONSULTANT OR THE IRS.
<PAGE>   2

            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                      NUMBER (TIN) ON SUBSTITUTE FORM W-9
             (SECTION REFERENCES ARE TO THE INTERNAL REVENUE CODE)

GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE
PAYER.--Social Security numbers have nine digits separated by two hyphens: i.e.
000-00-0000. Employer identification numbers have nine digits separated by one
hyphen: i.e. 00-0000000. The table below will help determine the number to give
the payor.

<TABLE>
<CAPTION>
- ------------------------------------------------------------
                                              GIVE THE
                                           SOCIAL SECURITY
       FOR THIS TYPE OF ACCOUNT:             NUMBER OF--
- ------------------------------------------------------------
<C>  <S>                                 <C>
 1.  Individual                          The individual
 2.  Two or more individuals (joint      The actual owner of
     account)                            the account or, if
                                         combined funds, the
                                         first individual on
                                         the account(1)
 3.  Custodian account of a minor        The minor(2)
     (Uniform Gift to Minors Act)
 4.  a. The usual revocable savings      The grantor-
        trust (grantor is also trustee)  trustee(1)
     b. So-called trust account that is  The actual owner(1)
        not a legal or valid trust
        under State law
 5.  Sole proprietorship                 The owner(3)
- ------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------
                                          GIVE THE EMPLOYER
                                           IDENTIFICATION
       FOR THIS TYPE OF ACCOUNT:             NUMBER OF--
- ------------------------------------------------------------
<C>  <S>                                 <C>
 6.  Sole proprietorship                 The owner(3)
 7.  A valid trust, estate, or pension   The legal entity(4)
     trust
 8.  Corporate                           The corporation
 9.  Associate, club, religious,         The organization
     charitable, educational or other
     tax-exempt organization
10.  Partnership                         The partnership
11.  A broker or registered nominee      The broker or
                                         nominee
12.  Account with the Department of      The public entity
     Agriculture in the name of a
     public entity (such as a state or
     local government, school district,
     or prison) that receives
     agricultural program payments
- ------------------------------------------------------------
</TABLE>

(1) List first and circle the name of the person whose number you furnish. If
    only one person on a joint account has a SSN, that person's number must be
    furnished.
(2) Circle the minor's name and furnish the minor's social security number.
(3) Show your individual name. You may also enter your business name. You may
    use either your SSN or EIN.
(4) List first and circle the name of the valid trust, estate or pension trust.
    (Do not furnish the identifying number of the personal representative or
    trustee unless the legal entity itself is not designated in the account
    title.)

NOTE: If no name is circled when there is more than one name, the number will be
      considered to be that of the first name listed.

<PAGE>   1
                                                             EXHIBIT 99(a)(5)(a)

                              FOR IMMEDIATE RELEASE

March 16, 2000

CONTACT:

John C. Osterman
President
Chicago Rivet & Machine Co.
(630) 357-8500

              CHICAGO RIVET & MACHINE CO. ANNOUNCES "DUTCH AUCTION"
                SELF TENDER OFFER FOR SHARES OF ITS COMMON STOCK

NAPERVILLE, IL (March 16, 2000) - Chicago Rivet & Machine Co. (AMEX - CVR) today
announced that it will commence a Dutch Auction self tender offer to purchase
for cash up to 225,000 shares of its common stock, which represents
approximately 19.8 % of its issued and outstanding common stock. The tender
offer is being made subject to the terms and conditions set forth in the Offer
to Purchase dated March 16, 2000 and the related Letter of Transmittal. The
tender offer begins today, Thursday, March 16, 2000 and will expire, unless
extended, at 5:00 p.m. New York City time on Friday, April 14, 2000.

Under the terms of the tender offer, Chicago Rivet shareholders may specify a
price not greater than $23.00 nor less than $20.00 at which they are willing to
tender their shares. After the expiration of the tender offer, Chicago Rivet
will determine a single per share purchase price that will allow it to buy
225,000 shares or, if a lesser number of shares are validly tendered, all shares
that are validly tendered. The same purchase price will be paid net to tendering
shareholders in cash, without interest, for all shares purchased pursuant to the
offer.

If more than 225,000 shares are validly tendered at or below the purchase price,
Chicago Rivet will accept shares on a pro rate basis. Chicago Rivet reserves the
right to purchase more than 225,000 shares pursuant to the tender offer. The
tender offer is not conditioned on any minimum number of shares being tendered.

At a meeting on February 21, 2000, the Board of Directors declared a regular
quarter dividend of $.18 per share payable to shareholders of record on March 3,
2000 and a special dividend of $.35 per share payable to shareholders of record
on April 5, 2000. Shareholders tendering shares in the offer will continue to be
shareholders of record until the shares are purchased in the offer, which will
not be before April 14, 2000. Consequently, any shareholder tendering shares in
the offer who held those shares on the applicable record date will be entitled
receive the dividend.

Neither Chicago Rivet nor its Board of Directors makes any recommendation to any
shareholder as to whether to tender or refrain from tendering shares or as to
the price at which shareholders may choose to tender their shares. Each
shareholder must


<PAGE>   2


make its own decision whether to tender shares and, if so, how many shares to
tender, and at which price or prices the shares should be tendered. Chicago
Rivet has been advised that none of its directors or executive offers intend to
tender any shares pursuant to the offer.

On March 15, 2000, the last trading day prior to the announcement of the offer,
the price per share for the last trade for the shares on American Stock Exchange
Composite Tape was $19.00. As of March 15, 2000, Chicago Rivet had 1,138,096
shares of its common stock issued and outstanding.

The Offer to Purchase, Letter of Transmittal and related documents will be
mailed to the shareholders of record of Chicago Rivet common stock and will also
be made available for distribution to beneficial owners of common stock.
Shareholders are urged to carefully read these materials prior to making any
decision with respect to the offer.

The dealer manager for the tender offer is BMO Nesbitt Burns Corp., and the
information agent is Georgeson Shareholder Communications, Inc. Shareholders may
obtain further information by calling Georgeson Shareholder Communications, Inc.
at (800) 223-2064.

Chicago Rivet & Machine Co. operates in two segments of the fastener industry;
fasteners and assembly equipment. The fastener segment consists of the
manufacture and sale of rivets, cold-headed fasteners and parts and screw
machine products. The assembly equipment segment consists primarily of the
manufacture of automatic rivet setting machines, automatic assembly equipment,
parts and tools for such machines, and the leasing of automatic rivet setting
machines.


                                        2




<PAGE>   1

                        Chicago Rivet & Machine Co. Logo

                                                                  March 16, 2000

To Our Shareholders:

     We invite you to tender your shares of our common stock for purchase by
Chicago Rivet. We are offering to purchase up to 225,000 shares at a price not
greater than $23.00 nor less than $20.00 per share, net to the seller in cash,
without interest, as specified by tendering shareholders.

     We will determine a single per share price that we will pay for shares
validly tendered, taking into account the number of shares tendered and the
prices specified by tendering shareholders. We will select the lowest purchase
price that will allow us to buy 225,000 shares or, if a lesser number of shares
are validly tendered, all shares that are validly tendered. All shares acquired
in the offer will be acquired at the same purchase price.

     Our offer is being made upon the terms and subject to the conditions set
forth in the enclosed Offer to Purchase and related Letter of Transmittal. I
encourage you to read these materials carefully before making any decision with
respect to the offer. The offer will expire at 5:00 P.M., New York City time, on
Friday, April 14, 2000, unless we extend it.

     Neither Chicago Rivet nor its Board of Directors makes any recommendation
to you as to whether to tender or refrain from tendering your shares or as to
the purchase price at which you may choose to tender your shares. You must
decide whether to tender your shares and, if so, how many shares to tender and
the price or prices at which you will tender them. Our directors and executive
officers have advised us that they do not intend to tender any shares in the
offer.

     If you do not wish to participate in this offer, you do not need to take
any action. If you do wish to tender your shares, the instructions on how to
tender shares are explained in detail in the enclosed materials.

     If you have any questions regarding the offer or need assistance in
tendering your shares, please contact Georgeson Shareholder Communications Inc.,
the Information Agent for the offer, at (800) 223-2064.

                                          J.A. Morris Signature
                                          John A. Morrissey
                                          Chairman and Chief Executive Officer

<PAGE>   1
Confidential
- --------------------------------------------------------------------------------

March 14, 2000


Mr John Osterman
Chicago River & Machine Co.
901 Frontenac Road
P.O. Box 3061
Naperville, IL 60566-7061

Dear John:

I am pleased to inform you that Bank of America, N.A. (the "Bank") has approved
a committed term credit facility subject to the following terms and conditions.
These terms and conditions are based on our analysis of your financial
information and the information you have provided.

LENDER:             Bank of America N.A. ("Lender" or "Bank")

FACILITIES:         Term Loan up to $9,000,000 ("Facility")

MATURITY:           60 months

PURPOSE:            To refinance $2,650,000 current loan outstandings, with the
                    balance available to finance proposed stock buy-back.

AVAILABILITY:       Fully available upon closing in a single draw.

SECURITY:           The Facility will be unsecured.

GUARANTY:           None.

CLOSING FEES:       $15,000

PRICING:            At the Borrow's option-
                    -    LIBOR, available for interest periods of 1, 2, 3, or
                         6 months, plus applicable margin below.

                    -    Bank of America's Reference Rate minus applicable
                         margin below.


                                                  Reference    Letters
                     Funded Debt        LIBOR       Rate         Of
                        Ratio          Margin-     Margin      Credit
                    --------------     -------    ---------    -------
                         1.75-2.25      1.30%       -0.25%      1.25%
                         1.00-1.75*     1.00%       -0.50%      1.00%
                         0.50-1.00      0.80%       -0.50%      1.00%
                    Less than 0.50      0.70%       -0.50%      1.00%



INTEREST RATE       Interest rate risk protection, in the form of a fixed rate
PROTECTION:         swap, cap collar, or other derivative contract, is
                    recommended for a portion of the outstandings under the
                    Facility.


- -------------------------------------------------------------------------------

Bank of America
<PAGE>   2
Confidential
________________________________________________________________________________

PREPAYMENTS:      Facility may be prepaid at any time on one business day's
                  notice (subject to applicable funding less indemnification
                  for LIBOR or other fixed rate borrowing).


AMORTIZATION:     $450,000 per quarter beginning June 1, 2000.

REPRESENTATIONS   Standard for a facility of this type including corporate
AND WARRANTIES:   standing, authorization/non conflict, legality and validity
                  of agreement, financial statements, no material adverse
                  change, no material litigation, ownership of properties,
                  existing subsidiaries, status of pension and welfare plans,
                  type of business, payment of taxes, solvency, environmental
                  status, absence of default, representation of validity of
                  information.


CONDITIONS TO     Receipt of documents, including but not limited to a note,
CLOSING:          corporate resolutions, consents, incumbency certificate,
                  opinion of counsel and other information reasonably requested,
                  receipt of financial statements for the Borrower as of
                  December 31, 1999.


REPORTING         The Borrower will be required to deliver the following to
REQUIREMENTS:     the Lender:

                  (i)   Annual audited consolidated financial statements
                        within 120 days of each fiscal year end.

                  (ii)  Quarterly financial statements of borrower within
                        45 days of each quarter end.

                  (iii) Quarterly compliance certificate to be delivered
                        within 45 days of the close of each fiscal quarter.

                   (iv) Other information as reasonably requested by the
                        Lender.

FINANCIAL          The borrower shall maintain financial covenants including,
COVENANTS:         but not necessarily limited to, the following (all financial
                   terms shall be defined in accordance with generally accepted
                   accounting principles applied on a basis consistent with the
                   most recently audited financial statements delivered prior
                   to closing):

                   o Maximum Funded Debt(1) to EBITDA(2) ratio of 2.25:1

                   o Minimum Debt Service Coverage ratio (EBITDA plus cash
                     equivalents less capital expenditures less dividend
                     payments/required principal and interest payments,
                     measured on a rolling four-quarter basis) of 1.5X

                   o Minimum Tangible Net Worth of $22,500,000 less actual
                     reduction through stock repurchase transaction up to
                     $7,500,000.

                   (1) Funded Debt includes all interest-bearing liabilities.

                   (2) EBITDA means net income before taxes, plus interest
                       expense, depreciation, and amortization, minus (plus)
                       gains (losses) on disposition of long-term assets. For
                       purposes of this ratio, EBITDA will be measured on a
                       rolling four-quarter basis.

OTHER COVENANTS:   Standard for a transaction of this type including
                   limitations on other indebtedness, liens, guaranties,
                   advances to affiliates (intercompany loans), dispositions,
                   mergers, consolidations and acquisitions.
<PAGE>   3


                 other covenants will also include, but not be limited to the
                 following: maintenance of books and records, maintenance of
                 insurance, compliance with laws, payment of taxes, maintenance
                 of corporate existence, maintenance of employee benefit plans,
                 compliance with environmental laws, landlord consents, use of
                 proceeds, and type of business.


EVENTS OF        The Events of Default will include, but not limited to, the
DEFAULT:         following:

                 (i)    Failure to pay principal when due, or failure to pay
                        interest, fees or other amounts within three days of
                        when due,

                 (ii)   Any representation or warranty made in connection with
                        this transaction (both prior to and after Closing) which
                        proves to have been false or incorrect in any material
                        respect on or as of the date made.

                 (iii)  Default in performance or observance of any of the
                        covenants, agreements or conditions in the agreement and
                        such defaults shall have continued, and a specified
                        grace period shall have elapsed, after knowledge by an
                        officer of the Borrower.

                 (iv)   Cross default of any nature (after expiration of any
                        grace period) of any indebtedness, or any other material
                        obligation, of the Borrower or any Subsidiary, which in
                        the aggregate is in excess of $100,000, or an event
                        occurs with respect to such indebtedness which after the
                        expiration of any grace period would allow for the
                        acceleration of such indebtedness.

                 (v)    Voluntary or involuntary commencement of insolvency
                        proceedings.

                 (vi)   An ERISA event shall have occurred with respect to a
                        pension plan or multiemployer plan which has resulted or
                        could reasonably be expected to result in liability of
                        the Borrower under Title IV of ERISA.

                 (vii)  One or more monetary judgments or settlements in excess
                        of $1,000,000 are rendered against the Borrower or its
                        Subsidiaries and any such judgment(s) is not discharged
                        or stayed within 30 days.

                 (viii) Invalidity of collateral documents.


EXPENSES:        Costs and expenses, including (if any) real estate and
                 equipment appraisals, environmental surveys, field exams and
                 attorney's fees (including costs and expenses of outside
                 counsel and allocated cost of in-house legal), incurred at any
                 time by BofA in the negotiation, documentation and closing of
                 the Facilities, regardless of whether the Facilities close. The
                 Company shall pay all costs and expenses incurred by BofA in
                 enforcing any loan document.

AUDITS:          To be performed at the Lender's reasonable discretion. All
                 audits shall be at the expense of the Borrower.

BANKING:         Borrower will maintain all principal accounts with the Lender.


DOCUMENTATION:   Closing is subject to (among other conditions precedent) the
                 receipt by the Lender of loan documentation in form and
                 substance satisfactory to it.

GOVERNING LAW:   State of Illinois.










<PAGE>   4


Confidential
- --------------------------------------------------------------------------------


If you wish to accept this commitment, please sign and return a copy of this
letter no later than March 31, 2000. If you do not respond by that time, or if
you respond but the credit does not close by April 30, 2000 for any reason, this
commitment will expire.

Bank of America, N.A.:

/s/ Jeffrey B. Mattson
- --------------------------
Jeffrey B. Mattson
Vice President


Accepted and approved this 14th day of March, 2000.
                           ----        ------


Chicago River & Machine Co.


By:  /s/ John C. Osterman
     ----------------------


Its: President
     ----------------------



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