The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure a heat exchanger, fluid, under a sole source contract with Sikorsky Aircraft Corp. The requirement includes one unit of the heat exchanger, identified by National Stock Number (NSN) 1R-1615-017023924-H5 and Part Number 06375-04801-128, which is critical for helicopter rotor blades and associated drive mechanisms. This procurement is classified as Foreign Military Sales (FMS) and is not set aside for small businesses, with the solicitation expected to be issued on January 13, 2026, and responses due by February 12, 2026. Interested parties are encouraged to submit capability statements to the primary contact, Taylor M. O'Connor, via email at taylor.m.oconnor2.civ@us.navy.mil.