The fastener is M16, and we are heading in the direction of being rid of lock washers in these applications. I am just thoroughly looking into the matter before we do so.
During my testing, I have only been able to recreate the failure by overtorquing the bolt. We normally torque it to 90 ft-lbs but we can't recreate failure in our testing until 130 ft-lbs.
I am looking into the proper use of spring lock washers. We have a few applications where we use them, but are having them split open while tightening. One concern is that lock washers are basically useless when torqued down until it becomes flat. Does anyone have any information on this?
