Used in all the units mechanical, and particularly adapted to the fields car, railway, aeronautical, the lock washers, brakes and check nuts rigorous quality controls at the time of the services of assembly undergo, in order to guarantee an undeniable reliability with the products.

For more than 120 years, IMPERATOR Industries, expert company in industrial cutting of the Group Eynard Robin, have manufactured lock washers/brakes/check nuts:
- all forms: standard or on plan
- all dimensions: standard standardized or on plan
- all matters: steels, stainless, aluminum, copper,...
- all completions: treated or not-treated
- all quantities: prototype with the great series