This GRAINGER APPROVED pipe nipple is suitable for use with air, water, oil, natural gas, and steam in high-pressure, high-temperature boiler applications.- NPT threads at both ends allow for easy connections- Nipple must be used with properly rated fittings Application / Air, Gas, Potable Water Finish/Coating / Galvanized Fitting Compatibility / Class 6000 Inside Diameter / 27/32 in Material / Steel Maximum Operating Pressure / 900 psi @ 150 Degrees F Maximum Steam Pressure / 6237 psi @ 650 Degrees F Metal Pipe Construction / Seamless Nominal Pipe Size / 1/2 in Outside Diameter / 53/64 in Overall Length / 1 1/8 in Pipe Weld Type / Electric Resistance Weld Schedule / Schedule 160 Side A Connection Type / Close Thread Side A Gender / Male Side A Thread Type / NPT Side B Connection Type / Close Thread Side B Gender / Male Side B Thread Type / NPT Standards / ANSI B1.20.1 Thread Configuration / Fully Threaded Wall Thickness / 0.188 in