Schedule 40 Socket Weld Flange Raised Face 1/2 in Nominal Pipe Size Flanged x Socket Weld 3 3/4 in Flange Outside Diameter 1/2 in Flange Thickness 7/8 in Overall Length Stainless Steel 304/304L 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