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 cabin pressurization valve (NSN 7R-4820-015076075-RQ). The contract requires that only sources previously approved by the Government may submit proposals, as the technical data necessary for alternative sourcing is not available, making reverse engineering uneconomical. Interested parties must provide comprehensive documentation to demonstrate their capability and experience in producing similar items, with a submission deadline of 45 days from the notice publication date. For further inquiries, potential bidders can contact Jena Visconto at (215) 697-2910 or via email at JENA.VISCONTO@NAVY.MIL.