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 Foreign Military Sales (FMS) spares, which are critical for maintaining the operational readiness of military aircraft. The procurement process will not be set aside for small businesses, as determined by the Small Business Administration representative, and interested vendors should direct their inquiries to Arianna Pillar at 215-697-2198 or via email at ARIANNA.PILLA@NAVY.MIL. The contract details, including delivery timelines and quality assurance provisions, will be outlined further in the solicitation documents.