Merrimac Files for Form 10-K Filing Extension

WEST CALDWELL, N.J., March 30, 2007: Merrimac Industries, Inc. (AMEX: MRM), a leader in the design and manufacture of RF Microwave components, assemblies and micro-multifunction modules (MMFM®), today filed Form 12b-25 which extends by up to fifteen days the filing deadline of its Annual Report on Form 10-K for the fiscal year 2006.

Due to unanticipated delays in reviewing compliance with certain contracts, some of which were fulfilled in the fourth quarter of 2006, Merrimac was unable to file its Annual Report on Form 10-K within the prescribed time period without unreasonable effort and expense. Merrimac expects to file the required report within the allotted extension.

Contact:

Mason N. Carter, Chairman & CEO
973.575.1300, ext. 1202
E-mail: mnc@merrimacind.com