The United States Coast Guard requires 10 units of a specific safety relief valve (NSN 4820-01-657-1440) for the 270 WMEC F/O Transfer Pump Relief Valve project. The valve must be a brand-name Kunkle 191-1 replacement or an approved equal, with strict packaging and marking per ASTM-D-3951 and MIL-STD-129R, including barcoding. Performance location is not specified, and no budget amount is provided. Award will be a firm fixed-price contract on an all-or-none basis to the lowest price technically acceptable offeror. All responsible sources must be registered in SAM.gov and submit required representations with their quotation.