This is a Sources Sought notice for the procurement of a CYLINDER BLOCK, HYDR for the B52 platform, with NSN 1650 001309347. The place of performance for services is Tinker AFB, Oklahoma. The applicable NAICS code is 336413, with a size standard of 1,250 employees. The government is interested in responses from all business types, including large and small businesses. No budget amounts or submission timelines are specified in the description.