The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of a Backplate Assembly, identified by NSN 7R-6680-016197395-FZ, with a quantity of 5 units required for delivery FOB Origin. This procurement necessitates engineering source approval due to the flight-critical nature of the part, which mandates that only approved sources may be considered for the contract, as they possess the unique design capabilities and technical data essential for maintaining the quality of the item. Interested vendors must submit their proposals along with the required source approval documentation within 45 days of this presolicitation notice, and any inquiries should be directed to Gina P. Sassane at (215) 697-2198 or via email at GINA.P.SASSANE.CIV@US.NAVY.MIL.