The Air Force is conducting market research via a sources sought notice to identify potential suppliers for the new manufacture of a butterfly valve (NSN 4810-01-146-0722YQ, P/N 458-50005-1) used on the KC-135 aircraft. Performance would be at Tinker AFB, Oklahoma. The government is interested in responses from all business types, including small, 8(a), SDVOSB, HUBZone, and women-owned firms, and may consider a small business set-aside or splitting the requirement by airframe. Interested parties must register as interested vendors, as no solicitation exists yet. The estimated spares requirement ranges from 10 to 56 units, and potential sources may incur nonrecurring engineering costs to become approved suppliers.