Schedule 40 Weld Neck Flange Raised Face 3/4 in Nominal Pipe Size Flanged x Weld Neck 4 9/16 in Flange Outside Diameter 9/16 in Flange Thickness 2 1/4 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 3/4 in Bolt Circle Diameter 5/8 in Bolt Hole Diameter