The Government intends to acquire six each of an NSN 7R-1615-017082535-CB part under TDP VER 001 with delivery FOB origin. The item is flight critical and requires Government source approval by the design control activity before award, and the Government intends to solicit and negotiate with only one approved source under FAR 6.302-1. Approved sources retain essential data/manufacturing/repair knowledge, so an alternate source must qualify through the cognizant Government engineering activity and submit the NAVSUP WSS Source Approval Brochure information with its offer; offers lacking required data will not be considered. All responsible sources may identify interest and capability or submit proposals, quotations, or capability statements, and parties may identify a commercial item that could satisfy the requirement, though FAR Part 12 commercial-item procedures are not being used. Drawings are not available.