About This Size: 3/8" Male x 3/8" Male NPT Thread. Tapered Thread. The thread OD is approx 5/8" x 5/8". NOTE: Thread size is a nominal pipe size and it does not represent the actual diameter, please check the size you need before ordering. Connection: Hex Nipple, suit for connecting and extending pipes. Material: Made of quality stainless steel 304, durable and stdury corrosion resistance, ductility at high temperatures, and low magnetic permeability. Widely Applications: Hydrant pipe, air compressor, laundry faucet, extended shower-head and hose, natural gas line and irrigation applications, etc. Operating temperature range: -65 to 250 degrees F; working pressure: 0-360 PSI; pressure rating : class 150. Overview Size : 3/8" x 3/8" NPT (O.D x O.D: 5/8" x 5/8") Material : Stainless Steel Brand : Hooshing Connector Type : Nipple Thread Size : 0.375 inch Thread Type : NPT Item Weight : 0.09 Kilograms Number of Pieces : 2 Manufacturer : Hooshing