This opportunity is for the procurement of 5 units of a specific liquid end pump (NSN 7H-3655-010655593-CP), with delivery required to DLA Distribution Norfolk, VA. The government lacks the data or rights to repair or source this part from additional suppliers, making it uneconomical to reverse engineer, so it will be acquired from approved sources only. Contracts will be awarded only to offerors whose inspection system conforms to MIL-I-45208A or equivalent, as certified by a joint DCMA/NAVSUP WSS survey team. The government intends to solicit and negotiate with only one source under FAR 6.302-1, but all responsible parties may submit capability statements or proposals for consideration. Proposals received within 45 days of this notice’s publication will be considered, and interested parties may also identify commercial item capability within 15 days.