Description Product OverviewThe black pipe fittings malleable screwed plug size is 1 inch for steam and water working pressure up to 150 pounds. It has a squared head.Product DetailsConnection Type: MPTHead Type: SquareLength: 1.25 inMaterial: Malleable IronNominal Size: 1 inOperating Temperature: -4 to 572 deg FPressure Rating: 300 psiSchedule Rating: SCH 40Suitable for: For Closing and Terminating the End of a Pipe or FittingFeaturesThe pipe plugs have a black finishThe pipe plugs are UL and FM certifiedThe pipe plugs meet ASTM and ASME standardsThe pipe plugs are made of 150 class malleable steelThe pipe plugs male NPT threads are for connecting to a Female pipe or fitting