The Department of Defense, through the Department of the Navy's NAVSUP Weapon Systems Support, is seeking proposals for the procurement of 91 units of a metallic seal (NSN 7R-2840-014106751-DQ) critical to aircraft operations. This procurement requires engineering source approval due to the flight-critical nature of the item, necessitating that only approved sources are solicited, as the technical data necessary for full and open competition is not available. Interested vendors must provide comprehensive documentation to demonstrate their qualifications, including any prior source approval requests, as offers lacking required data will not be considered. For further inquiries, potential bidders can contact Sophia J. Noel at (215) 697-4313 or via email at SOPHIA.NOEL@NAVY.MIL.