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 threaded brass insert has an internal thread and can be used as socket head or button head machine screw. A threaded plastic insert is a spiral ridge on the end of a pipe that enables pipes to be ...

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 ...