Irwin 1231ZR MACHINE SCREW TAP-BOTTOM

Designed for hand threading work in a variety of materials. Ideal for routine maintenance, repair work and for rethreading where high accuracy and tolerance thread is not critical. Straight flutes are ground to provide rapid chip removal for efficient threading. Taps produce a class 2B thread. No. of Flutes: 4. Height: 1/4". Length: 3". Width: 0.600". Tap Type: Bottom Tap.