It is just a kind of threaded insert. There are 2 styles: a single is meant to form a bulge within the back again facet from the panel like a screw is tightened in its threads. The opposite is in the same way drawn in employing a screw, but is https://hectorzrjyn.ampblogs.com/the-fact-about-threaded-inserts-for-plastics-that-no-one-is-suggesting-63326799