Smith-Cooper® Companion Flange, Series: 17TH2, 4 in Nominal, 1-1/4 in Thickness, 7.88 in Diameter Bolt Circle, 8 Bolt Holes, 5/8 in Bolt Hole, Thread Connection, 10 in OD, 250 lb Pressure Class, SCH 80/XH Schedule, 1-3/4 in Length Through Hub, Cast Iron, Black