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 ...

While a handyman can buy nuts and bolts of virtually any size almost anywhere at little cost, there are times when he or she must renew stripped threads, cut threads to fit existing nuts, bolts or ...

Advanced machine tool and cutting tool technologies reduce the cost and boost the quality of producing internal threads in aerospace materials. The diameter of a thread milling cutter is smaller than ...

Tapping screws form mating threads in materials they are driven into. There are two basic types: thread forming and thread cutting. The thread-forming screw displaced material around the pilot hole so ...

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 ...