Threaded Flange, Raised Face, 1/2 in Nominal Pipe Size, Flanged x FNPT, 3 3/4 in Flange Outside Diameter, 5/8 in Flange Thickness, 7/8 in Overall Length, Stainless Steel, 316/316L, Class Class 300, 720 psi Maximum Operating Pressure, 300 psi Max. Steam Pressure, Number of Bolt Holes 4, 2 5/8 in Bolt Circle Diameter, 5/8 in Bolt Hole Diameter