We have all done it, overtightened a bolt and blown out the threads. When a bolt starts to tighten up and then go suddenly loose, you know that the threads are toast and now you have a problem.

Threaded fasteners are a necessity for almost any mechanical device. When making changes to a machine, one can add threads by tapping the part itself, or by using a nut. A nut can even be welded to a ...

Engineers at General Dynamics Land Systems, Sterling Heights, Mich., faced a challenge when designing the Expeditionary Fighting Vehicle for the U. S. Marine Corps. The amphibious combat craft needed ...