The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of 20 emergency boxes (NSN 7R-1680-015817857-E7) critical for aircraft operations. This procurement requires engineering source approval due to the flight-critical nature of the item, necessitating that only approved sources may submit proposals, as the technical data and manufacturing knowledge are not readily available to the Government. Interested parties must provide detailed documentation for source approval, and proposals must be submitted within 45 days of this notice, with the primary contact for inquiries being Kimberly Flores at (215) 697-6549 or via email at KIMBERLY.FLORES@NAVY.MIL.