The government seeks a core assembly, fluid heat exchanger, NSN 4420012025749, with Line 0001 quantity 18 AY delivered to the General Depot of Naval Supplies within 20 days after date of order. Approved sources are 74924 72-19750-31 and 74924 729XA0563. The solicitation is an RFQ available only through the provided link; hard copies and specifications, plans, or drawings are not available. All responsible sources may submit quotes electronically for consideration.