| I use two nuts to avoid the spinning bolt problem. First, a non-locking nut. It will normally pose no problem to screw on a non-locking nut (in the worst case, I use a side cutter to cautiously grip the bolt in its threads). Afterwars, the bolt is tight enough so I can screw on the lock nut. Of course, the bolt needs to be long enough to accept two nuts.
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