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- Reducing Companion Flange, Series: 17RT1, 4 in Nominal, 1.12 in Thickness, 11-3/4 in Bolt Circle, 8 Bolt Holes, 7/8 in, Threaded, 13-1/2 in Outside Dia, 125 lb, Cast Iron, Black
- Connection TypeThreadedMaterialCast IronNominal Size4 inPressure Class125 LbBolt Circle Diameter11-3/4Bolt Hole Size7/8FinishBlackManufacturerFirst Supply ApprovedNumber of Bolt Holes8Outside Diameter13-1/2Series17RT1Thickness1.12 in