Schedule 40 Socket Weld Flange, Raised Face, 1 1/2 in Nominal Pipe Size, 5 in Flange Outside Diameter, 11/16 in Flange Thickness, Stainless Steel, 316/316L, Class Class 150, Number of Bolt Holes 4, 3 7/8 in Bolt Circle Diameter, 5/8 in Bolt Hole Diameter.