The thread sizes are a little on the small size for loctite, you might well have problems disassembling if you ever need to. A simple and straight forward u/g when building would be to use nylock nuts along with the anti-vibration washers. I would also recommend you put nylon or rubber spacer washers for every circuit board that has a blanking board  between it and the chassis i.e. the FET and power supply boards.

I'm sure there are other u/g's that others will chip in with.