The Department of Defense, specifically the Department of the Navy, is seeking to procure three units of a reciprocating pump under a presolicitation notice. The procurement involves the repair and modification of a specific National Stock Number (NSN 7H-4320-015352315) and is limited to one source due to the government's lack of ownership of the necessary data for competitive procurement. These pumps are critical components in various military applications, and the government has determined that it is uneconomical to reverse engineer or purchase the data required for alternative sourcing. Interested parties can reach out to Benjamin Speros at NAVSUP Weapon Systems Support for further inquiries, with the understanding that this notice does not constitute a request for competitive proposals.