It is just a kind of threaded insert. There are 2 forms: 1 is built to variety a bulge within the back again facet of the panel like a screw is tightened in its threads. The other is in the same way drawn in employing a screw, but is drawn https://traviskbrgs.onesmablog.com/5-essential-elements-for-inserts-for-metal-alloy-66750775