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.

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 ...

The bolts holes are stripped and damaged on this Caterpillar D9T Bulldozer transmission cover! Someone has also tried to repair one of the holes using a self tapping thread repair insert but the hole ...