They hold together everything from the most delicate watch to the largest bridge. The world is literally kept from coming apart by screws and bolts, and yet we don’t often give a thought to these ...

The strength of some internal threads is more sensitive to tap diameter than previously thought. • Cold-formed threads are no stronger than cut threads when holes are correctly sized. • Cut threads ...

The diameter of a thread milling cutter is smaller than the drilled hole, and the cutter turns in an elliptical orbit to reduce cutting torque when compared with machine tapping. One of the most ...