IRWIN 1904ZR Pipe Taper Tap, Tapered Point, 4-Flute, HCS

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.