This ASME/ASTM-certified, class 150, 1 1/2-inch hex head plug has an MNPT connection type. The male thread of this pipe fitting has a pre-applied PTFE thread sealant for extra leak protection. It is made of 316 stainless steel for excellent corrosion resistance. This product has a maximum operating pressure of 150 PSI with a temperature range of 0 Degrees F to 360 Degrees F.