Hex Locknut, Pipe Fitting Material Malleable Iron, Fitting Schedule/Class Class 150, Pipe Size - Pipe Fitting 3/4 in, Fitting Connection Type FNPT, Standards Class 150, Dimensions Conform to Federal Specifications WW-P-521, Material Specification ASTM A-197, Standards ANSI B 16.39, Max. Pressure 300 psi@150 Degrees F, Saturated Steam Pressure 150 psi, Temp. Range -20 Degrees to 366 Degrees F. This item has been restricted from sale in the following state (s): []