Flange, Raised, 1/2 in Nominal Pipe Size, 3 1/2 in Flange Outside Diameter, 7/16 in Flange Thickness, Not Applicable Overall Length, Stainless Steel, Plain, 316, Class Class 150, For Pipe Schedule Not Applicable, 285 psi Maximum Operating Pressure, Number of Bolt Holes 4, 2 3/8 in Bolt Circle Diameter, 5/8 in Bolt Hole Diameter