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.

Key design features include retention barbs that give the fastener easier insertion into round holes and help prevent inserts from spinning when installed. Flange tabs on both ends orient inserts in ...

One of the greatest advantages of designing plastic parts is the vast number of assembly options a designer can apply to his or her design. The most common among these options is the use of screws.