This is a sources sought notice for market research only, not a solicitation, to identify potential sources for the new manufacture of a regulating valve (NSN 4820-01-109-4813HS, Part Number 5102-3) used on the T-38 platform, with an estimated spare requirement of 38 units. Interested parties must register through the “Add Me to Interested Vendors” button to be considered participants; no solicitation is available at this time. Performance would be at Tinker AFB, Oklahoma. The applicable NAICS code is 336413 with a 1,250-employee size standard, and the government is interested in responses from large, small, and various socio-economic business categories. The government may consider breaking the requirement out by airframe and will use responses to determine whether the effort can be competitive or set aside for small business.