This opportunity is for the acquisition of a single unit of NSN 7R-1680-017336838-H5, a flight-critical part requiring engineering source approval from the design control activity. Only previously approved sources are solicited, as the part relies on unique design capability and technical data not economically available to the government. New sources must submit qualification data per the NAVSUP WSS Source Approval Brochure, but approval timelines typically prevent delaying award for new source evaluation. Delivery is FOB origin, and the government intends to negotiate with only one source under FAR 6.302-1. All responsible sources may submit capability statements or proposals within 45 days of the synopsis publication to be considered.