Right [MENTION=54245]sevenfourate[/MENTION], is this in any way helpful? I make the diameter of the washer 6mm, however the bolt isn't that. The bolt is obviously thinner to fit through the washer and I make it 5mm.
they look great..think i need some as i im getting a bit of a rattle from under the bonnet. @jimmyd81 helped me fixed it temporally on the Scotland trip but could do with a more permanent solution..