Irwin 8011 Machine Screw Tap, #4-36 NS Thread, Plug Tap Thread, 3-Flute, HCS

Straight flutes are ground to provide rapid chip removal for efficient threading, for hand threading work in a variety of materials. Taps produce a class 2B thread. Used in applications such as routine maintenance, repair work and for rethreading where high accuracy and tolerance thread is not critical.