The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of five units of a flight-critical item identified by NSN 7R-1680-016276004-P8 and reference number 456796-1003. This procurement requires Government source approval prior to contract award, as the item is essential for operational readiness and the technical data available does not support full and open competition. Interested vendors must provide the necessary documentation for source approval along with their proposals, as offers lacking this information will not be considered. For further inquiries, interested parties can contact Jacob A. Tarini at (215) 697-3563 or via email at JACOB.TARLINI@NAVY.MIL, with proposals due within 45 days of this notice.