Taper Pipe Tap (HCS), 2 in 11 1 2 NPT,Taper Tap, 6 Flutes ORS NASCO Tight tolerances for snug fit Tight tolerances for snug fit on fastener Ball and spring design which allows for a 30° working angle Designed to withstand the high torque and force associated with impact tools in repetitive application Features two through holes and a groove to accept a Proto® Retaining Ring or pin and O ring to help secure the socket to the drive tool anvil Position at appropriate angle to turn fasteners where obstructions prevent a straight application flexible premium pad construction for surface preparation Cuts internal threads in pipes Nominal size of the tap is that of the pipe fitting being tapped Available in National Pipe Taper (NPT) and British Standard Pipe Taper (BSP) Ideal for pipe fittings Tapered at a rate of 3 4" per foot