Inserts are classified as two general types: those held in place by external threads and those that use some means other than threads (knurls, grooves, interference fit) for their holding power.

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 ...

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 ...