Nord-Lock washers

[Zeus36]

Nord-Lock washers secure bolted joints with tension instead of friction. Sizes down to M3:


http://www.nord-lock.com/nord-lock/wedge-locking/washers/introduction/

https://www.youtube.com/watch?v=ZSOjxU3pdSU

 

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I hear they work but aren't cheap.

My hardware supplier just started carrying them.

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