Features This GRAINGER APPROVED hex head plug is designed with 304 stainless steel for good corrosion resistance. Compatible with stainless steel Schedule 40 pipe. For use with air, water, oil, natural gas, and steam. Pipe Fitting Material / 304 Stainless Steel, Stainless Steel Material Grade / 304 Class / Class 150 For Pipe Schedule / 40 Fitting Side A Nominal Pipe Size / 1/2 in Fitting Side A Gender / Female Fitting Side A Type / NPT Fitting Side A Outside Diameter / 1/2 in Fitting Side A Pipe Threading / 18 Fitting Side B Nominal Pipe Size / 3/8 in Fitting Side B Gender / Female Fitting Side B Type / NPT Fitting Side B Outside Diameter / 3/8 in Fitting Side B Pipe Threading / 18 Maximum Operating Pressure / 300 psi Max. Steam Pressure / 150 psi Overall Length / 44.4 mm Color / Silver Application / Air, Natural Gas, Non-Potable Water, Oil, Potable Water, Steam Standards / ASME B1.20.1, ASTM A351, MSS SP-114