The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of two units of a flight-critical part identified by NSN 7R-1680-015927961-E7, with reference number 5211890-100. This procurement requires engineering source approval from the design control activity to ensure the quality of the part, as only approved sources with unique design capabilities and manufacturing knowledge will be considered for the contract. Interested vendors must submit detailed information regarding their qualifications and experience, as well as any necessary documentation for source approval, within 45 days of this presolicitation notice. For inquiries, interested parties can contact Hayden Young at (215) 697-2928 or via email at HAYDEN.J.YOUNG3.CIV@US.NAVY.MIL.