Pemhex is a self-clinching prevailing torque lock-nut from Penn Engineering, with the integrated nylon insert there to resist screw loosening in service due to vibration and thermal cycling. “The ...

A special thread form keeps bolts and nuts tight under vibration by attacking the problem from a different angle. Two conventional methods for securing threaded fasteners against preload loss include ...

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.