This opportunity is for the acquisition of 6 units of a specific part (NSN 7R-4920-013821378-GF) that requires engineering source approval from the Government due to its flight-critical nature and limited technical data. Only previously approved sources have been solicited, and new sources must submit detailed qualification information as outlined in the NAVSUP WSS Source Approval Brochure. The Government intends to negotiate with only one source under FAR 6.302-1, but all responsible sources may submit capability statements or proposals for consideration. Proposals from non-approved sources must include all required source approval data, or they will not be considered for award. Performance is FOB origin, and no specific budget amount or performance location is mentioned.