Quote Originally Posted by Wetpool View Post
Good experience with them myself as well. If you want to undo them, you feel clearly at first some movement of the locked nut (or bolt) but inmidiately the momentum increases to a certain level and then quite suddenly breaks away. For this to work both washers need to dig their teeth into both surfaces. I wonder if they would be able to do so on hardened bolts, f.e. 12.9 steel..?
BR, Theo
This is also my concern - the Nordlocks must have a higher hardness than the materials that the washers will interface with and in many cases I won't know this, e.g. where the washers would be placed against a wishbone bush.