Not Ranked
I saw an interesting video with bolts under vibration.
The nut would just wind itself of the bolt if it's not tight, with a spring lock washer, the same happened. The nylock one will just ensure it doesn't wind of the bolt, it will never prevent it coming loose in the first place. It needs to be torqued up right. A split pin being the ultimate lock. Try cutting a bolt with a nut on it with an angle grinder, you'll see it wind along the bolt with the vibration.
JD
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