Merrimac Industries 10-Q 2005 Q1 Quarterly report

                                                                    EXHIBIT 32.1

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

The undersigned, Mason N. Carter, Chief Executive Officer of Merrimac
Industries, Inc. (the "Company"), hereby certifies, pursuant to 18 U.S.C. 1350,
as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

     (1) The Company's Quarterly Report on Form 10-Q for the period ending April
     2, 2005, as filed with the Securities and Exchange Commission on the date
     hereof (the "Quarterly 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 Quarterly Report fairly presents, in
     all material respects, the financial condition and results of operations of
     the Company.




/s/ Mason N. Carter
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Mason N. Carter
Chief Executive Officer
May 17, 2005