The Department of Defense, through the Department of the Navy's NAVSUP Weapon Systems Support, is seeking qualified sources for the procurement of 25 units of flight-critical oxygen regulators and similar replacement parts, as indicated by NSN 7R-1660-015303498-FZ. This presolicitation requires that all potential suppliers obtain Government source approval prior to contract award, as the technical data available does not support full and open competition, emphasizing the critical nature of the item. Interested parties must submit the necessary documentation for source approval along with their proposals, as offers lacking this information will not be considered. For further inquiries, contact Chris Campellone at (215) 697-2530 or via email at CHRISTOPHER.CAMPELLO@NAVY.MIL.