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- Blind Flange, Series: 17BL1, 4 in Nominal, 0.94 in Thickness, 7-1/2 in Bolt Circle, 8 Bolt Holes, 3/4 in, 9 in Outside Dia, 125 lb, Cast Iron, Black
- MaterialCast IronNominal Size4 inPressure Class125 LbBolt Circle Diameter7-1/2Bolt Hole Size3/4FinishBlackManufacturerFirst Supply ApprovedNumber of Bolt Holes8Outside Diameter9Series17BL1Thickness0.94 in