The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for a pressure gauge identified by NSN 1R-0000-LLF02G787-SX, with a quantity of one unit required for delivery FOB origin. This procurement is critical as the item is flight critical, necessitating government source approval prior to contract award; only previously approved sources will be considered for this solicitation. Interested vendors must submit comprehensive documentation as outlined in the NAVSUP Source Approval Information Brochures, and proposals must be submitted within 45 days of this presolicitation notice. For further inquiries, potential bidders can contact Taylor M. O'Connor at (215) 698-2198 or via email at TAYLOR.M.OCONNOR2.CIV@US.NAVY.MIL.