The Air Force is seeking spares for a mechanical housing (NSN 1650-00-133-9481, PN 706963) used on the B-52 constant speed drive/generator interface. The requirement is 39 each, with a quantity range of 10–59, and delivery is required on or before October 30, 2027, shipped to Tinker AFB, OK. This is a limited-source acquisition requiring an approved source; the only qualified source identified is Hamilton Sundstrand Corporation (CAGE 99167), with no set-aside and surplus not authorized. The Government does not own the data or rights needed to manufacture the item, so interested firms should contact the OEM regarding data/rights, and foreign-owned firms should check restrictions before proposing. The solicitation will be available electronically via SAM.gov, commercial-item policies apply, and the anticipated award is 90 days after issuance of the notice.