Threaded Flange Raised Face 3 in Nominal Pipe Size Flanged x FNPT 8 1/4 in Flange Outside Diameter 1 1/16 in Flange Thickness 1 11/16 in Overall Length Stainless Steel 304/304L Class Class 300 720 psi Maximum Operating Pressure 300 psi Max Steam Pressure Number of Bolt Holes 8 6 5/8 in Bolt Circle Diameter 7/8 in Bolt Hole Diameter