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Yeah got that bit & the reason why it happens is the nut on the bolt grabs on one surface of the washer in turn the washer grads the face of the nutsert & as you turn the nut the whole lot starts...

You might also try using 2 washers with a dab of grease in between them to give it a slip point.......... Don't know if it would work but worth a try.

These thing leave a nice finish & I could go spastic with a box of them.....lolol

Thanks AB bloody good post.