It should be resistant to falling screws! The English name is Nylock.

It uses special technology to permanently adhere special engineering resin to the threads. It uses the resilience of the engineering resin material to make the bolts and nuts achieve alignment through extrusion during the locking process. The absolute resistance to vibration and impact completely solves the problem of screw loosening. Anti-loosening is the registered trademark used by Taiwan Niluo Company on screw anti-loosening treatment products. The screws on the market that have been anti-loosening treated by Niuluo Company are named anti-loosening screws.