<PAGE>
January 27, 1997
Securities and Exchange Commission
450 Fifth Street N.W.
Washington D.C. 20549
Attn: Filing Desk, Stop 1-4
Re: TN Technologies Holding Inc.
Registration Statement on Form 8-A
Ladies and Gentlemen:
On behalf of TN Technologies Holding Inc., a Delaware corporation (the
"Company"), we respectfully request that the Company's Registration Statement on
Form 8-A be withdrawn as of the date hereof. The Company's request is based on
the fact that its Registration Statement on Form S-1 (File No. 333-15161) has
not yet been declared effective. The Company intends to file a new Registration
Statement on Form 8-A at or near the time its Registration Statement on Form S-1
is declared effective.
Please acknowledge receipt of this letter by date-stamping the enclosed
copy and returning it to me in the envelope provided. If you have any questions
regarding this matter, please call me at (415) 493-9300.
Very truly yours,
WILSON SONSINI GOODRICH & ROSATI
Professional Corporation
/s/ Brian C. Erb
cc: Steven C. Duvall, Assistant Director
Rico Vicencio
Gregory W. Blaine