The Department of Defense, through the Defense Logistics Agency (DLA Aviation), is seeking quotes for the procurement of 21 units of the NSN 1680015439900, specifically a defuel valve for aircraft. This procurement is a source-controlled drawing item, meaning that only approved sources, identified by specific part numbers, are eligible to provide the required goods. The defuel valve is critical for aircraft operations, ensuring safe and efficient fuel management. Interested vendors must submit their quotes electronically, as hard copies of the solicitation will not be available, and all inquiries should be directed to the buyer via the provided email address, DibbsBSM@dla.mil. The delivery is expected at DLA Distribution San Diego within 401 days after order placement.