The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of a secondary valve, identified by NSN 7R-2910-015882376-V2. The procurement involves a quantity of five units, with delivery terms set to FOB Origin, and requires government source approval prior to contract award due to the flight-critical nature of the item. This opportunity is significant as it pertains to essential components within engine fuel systems for non-aircraft applications, and only previously approved sources will be considered for this contract. Interested parties must submit their proposals, including necessary source approval documentation, to Jacob A. Tarini at jacob.tarlini@navy.mil within 45 days of the notice publication, as the government intends to negotiate with a single source under FAR 6.302-1.