Socket Weld Flange, Raised Face, 1-1/2 in Nominal, 1.95 in ID, 0.62 in Thickness, 3.88 in Diameter Bolt Circle, 4 Bolt Holes, 5/8 in Bolt Hole, 5 in OD, 285 psig Pressure, 150 lb Pressure Class, -20 to 100 deg F, 2.56 in Diameter Hub, 0.81 in Length Through Hub, Forged Carbon Steel, Domestic