Tap & Drill Set, National Coarse Thread, #12 X 24

#12 x 24, national course thread, tap & drill set, carbon steel, ideal for routine maintenance, repair work & for rethreading where high accuracy & tolerance thread is not critical, straight flutes are ground to provide rapid chip removal for efficient threading, designed for hand threading work in a variety of materials taps produce a class 2b thread, includes #16 drill bit.