[davidimurray]

My logic comes from my my days playing with race cars and dealing with scruiteneers. The basic rule that we worked to was any fastener that could affect the operation of the car must have a positive and clearly visible locking method - i.e loctite was not acceptable as you couldn't prove it was there. So we used Nylocks, K-nuts, lockwiring etc.

I may also be paranoid as a mate who races dropped out of a race a few weeks ago when the plain nut on his earth stud come loose and the car died. Similarly I wouldn't want to be in the outside lane of the motorway when the engine cut out due to a loose earth!