Featuring 304 stainless steel construction, this GRAINGER APPROVED cap fitting has a chromium nickel material that offers very good corrosion resistance. - Compatible with Schedule 80 stainless steel pipe - For use in air, water, and natural gas applications Pipe Fitting Material / 304 Stainless Steel Fitting Schedule/Class / Class 3000 Pipe Size - Pipe Fitting / 1/2 in Fitting Connection Type / FNPT Max. Pressure / 2570 psi @ 100 Degrees F Max. Steam Pressure / 1965 psi @ 350 Degrees F Outside Dia. / 1 1/8 in Standards / Threads conform to ASME B1.20.1 NPT; Materials conform to ASTM A182, Dimension conform to ASME B16.11