Lap Joint Flange, 1-1/2 in Nominal, 0.69 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 1000 deg F, 2.56 in Diameter Hub, 0.88 in Length Through Hub, Forged Carbon Steel, Domestic