Threaded Flange, Raised Face, 1 1/4 in Nominal Pipe Size, Flanged x FNPT, 5 1/4 in Flange Outside Diameter, 3/4 in Flange Thickness, 1 1/16 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, 4 1/2 in Bolt Circle Diameter, 3/4 in Bolt Hole Diameter