The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support MECH, is seeking to procure four units of a heat exchanger, identified by NSN 0O-1660-016837148. The procurement is a total small business set-aside, and the government intends to negotiate with only one source due to the unavailability of data or rights needed for competitive procurement. The heat exchanger is crucial for aircraft air conditioning, heating, and pressurizing systems, underscoring its importance in maintaining operational readiness. Interested parties should contact Sarah Haley at (717) 605-3550 or via email at SARAH.R.HALEY2.CIV@US.NAVY.MIL for further details, as the solicitation is not a request for competitive proposals and responses are due within 15 days of this notice.