Vibration resistant non loosening bolting system

Loosening of bolts is a major bug bear of the manufacturing industry. All sorts of tricks are resorted to to minimise this problem often with indifferent results.

An interesting concept seems to be to use a softer nut with a harder bolt. At the final tightening the softer metal of the nut 'flows' over the threads on the bolt and gets swaged. This will not work loose, yet can be removed if needed using regular tools.

I am going to give it a try. Here are some details:
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