The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of six units of the Driver Assembly, identified by NSN 7R-1680-016017102-E7 and reference number 8360293-001. 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 comprehensive documentation to demonstrate their qualifications, including any prior source approval requests, and must do so within 45 days of this presolicitation notice. For further inquiries, potential bidders can contact Christian M. Markle at (215) 697-6679 or via email at CHRISTIAN.MARKLE@NAVY.MIL.