The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of nine check valves (NSN 1R-4820-016814896-P8, REF NR 708108-1). These valves are classified as commercial/nondevelopmental/off-the-shelf items and are critical for flight operations, necessitating government source approval prior to contract award. Interested vendors must provide detailed technical data and documentation as outlined in the NAVSUP WSS Source Approval Information Brochures, as offers lacking this information will not be considered. Proposals must be submitted within 45 days of this notice, and interested parties can contact Jessica L. Harpel at (215) 697-2995 or via email at JESSICA.HARPEL@NAVY.MIL for further details.