Screw inserts for plastics may not seem all that expensive. Unless, that is, your application requires hundreds of thousands or millions of them. For these high-volume jobs, PennEngineering Fastening ...

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.

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.