The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure 27 units of Ethylene Glycol, identified by NSN 7R-5999-016816774-P8 and reference number 708400-1. 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 for alternative sources has not been deemed adequate for full and open competition. Interested parties must provide comprehensive documentation as outlined in the NAVSUP Source Approval Information Brochures, and proposals must be submitted within 45 days of this notice, with contact inquiries directed to Jessica L. Harpel at jessica.harpel@navy.mil or by phone at (215) 697-2995.