The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is soliciting proposals for the procurement of heat exchangers for aircraft, classified under the NAICS code 336413. This request for proposal (RFP) is aimed at acquiring spare parts essential for maintaining aircraft air conditioning, heating, and pressurizing systems, which are critical for operational readiness and safety. The procurement process does not include a set-aside for small businesses, and interested vendors should direct inquiries to Arianna Pillar at 215-697-2198 or via email at ARIANNA.PILLA@NAVY.MIL. The timeline for delivery and further specifics will be outlined in the solicitation documents, which are expected to be released shortly.