EXHIBIT 99.3

                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Chicago Rivet & Machine
Co. (the "Company") for the quarterly period ended March 31, 2003 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
John C. Osterman, as Chief Financial Officer of the Company, hereby certify,
pursuant to 18 U.S.C. ss. 1350, as adopted pursuant to ss. 906 of the
Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

         (1) The Report fully complies with the requirements of Section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

         (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Company.


/s/ John C. Osterman
- -----------------------------
Name:  John C. Osterman
Title: Chief Financial Officer
Date:  May 5, 2003

This certification accompanies the Report pursuant to ss. 906 of the
Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the
Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes of ss.18
of the Securities Exchange Act of 1934, as amended.

A signed original of this written statement required by Section 906 has been
provided to Chicago Rivet & Machine Co. and will be retained by Chicago Rivet &
Machine Co. and furnished to the Securities and Exchange Commission or its staff
upon request.




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