The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of a flight-critical fastener, identified by NSN 1R-1680-LLF02N683-P8, with a quantity of 2 each. This procurement is for a commercial/non-developmental item that requires Government source approval prior to contract award, as the technical data available has not been deemed adequate for full and open competition. Interested vendors must provide necessary documentation for source approval along with their proposals, as offers lacking this information will not be considered. For further inquiries, interested parties can contact Helen I. Carmelo at (215) 697-1138 or via email at HELEN.I.CARMELO.CIV@US.NAVY.MIL, with proposals due within 45 days of the notice publication.