Tap Drill Set, National Course Thread, 4 X 40

Description

#4 x 40, 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 #43 drill bit.

Drill and tap set

Tap is designed for hand cutting applications

Wire gauge drill bits are made from premium grade high speed steel

Wire gauge dill bits are for general purpose drilling in wood metal and plastic