It is just a kind of threaded insert. There are two sorts: one particular is built to sort a bulge to the back again facet of the panel like a screw is tightened in its threads. The opposite is similarly drawn in using a screw, but is drawn into your https://lt1464acn8pbf91003.blogocial.com/the-greatest-guide-to-threaded-inserts-for-plastics-62588627