On September 2018, one of the global leaders in self-locking nuts market, TR Fastenings, launched a new wedge lock-nut. The wedge lock-nut is assembled with a nut and a washer that uses tension to ...

Anyone who has ever pounded on a stuck bolt or used an impact wrench to remove a rusty nut knows ... less likely to self-loosen. A similar mechanism is at work in the wedge-locking washers.