This ASTM/ANSI/ASME-certified, class 150, 1 x 3/4-inch reducing hex nipple has an MNPT x FNPT connection type. The male thread of this pipe fitting has a pre-applied PTFE thread sealant for extra leak protection. It is made of 304 stainless steel for good corrosion resistance. This product has a maximum operating pressure of 150 PSI.