It is just a form of threaded insert. There are 2 styles: a single is meant to type a bulge about the again side with the panel to be a screw is tightened in its threads. The other is likewise drawn in utilizing a screw, but is drawn to the https://angelozqere.tinyblogging.com/the-2-minute-rule-for-inserts-for-metal-alloy-70281007