It all depends on what you're doing, what your fastening and why and if you're doing is falling apart.
for high vibration use, where everything just rattles loose, Nordlock washers seem to work pretty good. There seems to be magic resonant frequencies where nuts and bolts just start to fall out, which can be quite entertaining.
Depends on the size of your nuts......:)
I would disagree. After the washer is collapsed and the bolt is tensioned there is no added force to the bolt frm the washer. Just more space between the bolt head and the work surface.
You are WRONG!
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