This is a procurement for five Frequency Converters, spares for the KC-46 aircraft, with a required delivery date on or before October 2, 2026. The performance location for delivery is SW3211. The notice states the Government intends to solicit and negotiate with only one or a limited number of sources, specifically noting Avionic Instruments, LLC as a qualified source, and it is not set aside for small business. Interested parties must contact the OEM for necessary manufacturing data, and foreign-owned firms should contact the contracting officer before submitting a proposal.