Slip-On Flange, Raised Face, 1 in Nominal, 1.36 in ID, 1/2 in Thickness, 3.12 in Diameter Bolt Circle, 4 Bolt Holes, 5/8 in Bolt Hole, 4-1/4 in OD, 285 psig Pressure, 150 lb Pressure Class, -20 to 100 deg F, 1.94 in Diameter Hub, 0.62 in Length Through Hub, Forged Carbon Steel, Domestic