Square Head Plug, 1/4 in Nominal Pipe Size, Steel, Galvanized, Class Class 150, Male NPT, 300 psi @ 150 Degrees F Maximum Operating Pressure, 150 psi @ 350 Degrees F Max. Steam Pressure, -20 Degrees to 350 Degrees F, Plug Construction Solid, Includes Pre-Applied Thread Sealant No, Includes Seal No