Features NPT threads. Air, Natural Gas, Propane, Steam, Water. Extra-heavy nipples handle higher pressures and more rugged service. Note: Nipples must be used with properly rated fittings. Fitting Compatibility / Schedule 80 Inside Diameter / 1 9/16 in Material / Stainless Steel Material Grade / 304 Maximum Operating Pressure / 2053 psi @ 650 Degrees F Maximum Operating Temperature / 650 Degrees F Metal Pipe Construction / Seamless Minimum Operating Temperature / -20 Degrees F Nominal Pipe Size / 1 1/2 in Outside Diameter / 1 7/8 in Overall Length / 1 3/4 in Schedule / Schedule 80 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 / ASME B1.20.1, ASTM A312, ASTM A733 Thread Configuration / Fully Threaded Wall Thickness / 0.177 in