This Sioux bushing is recommended for use with brass, copper, or iron pipe. It is made of brass for strength, durability and rust resistance. The bushing features a 1/2" male threaded end and a 3/8" hex female threaded end. It is typically used in used on oil, natural gas, water, and air line applications. | Sioux Chief Hex Bushing - Brass - 1/2" x 3/8" - MIP x FIP 930-15201601