The U.S. Coast Guard is seeking quotations for six custom-manufactured, non-cancelable pressure switches (NSN 5930-01-599-6653) for the 210 WMEC A/C system. Performance is required in Baltimore, MD (USCG SFLC, 2401 Hawkins Point Road), with FOB Destination delivery. Strict military-grade packaging, packing, and marking per MIL-STD-2073-1E and MIL-STD-129R are mandatory; standard commercial packaging will be rejected. The government intends to award a sole-source, firm-fixed-price contract to Dwyer Instruments Inc. or its authorized distributors, but all responsible sources may submit a technically acceptable, lowest-price quote. Offerors must be registered in SAM and provide a letter from the OEM verifying authorized distributor status.