Steelville Manufacturing Co. was started in 1959 and is a contract machine shop specializing in milling, turning, and waterjet cutting. In 1966, Steelville Manufacturing was approved to work for McDonnell Aircraft Company. As of January 1993, we became a Preferred Supplier to McDonnell Douglas and have continued this relationship with Boeing. We have 224 employees at our facility in Steelville, MO.