Copper nuts don't rust much, on top they have flexibility, they stay
more tight and also expend better.

They are somewhat expensive.

Ben

neil N wrote:

>Interesting to know that VW metal used in those studs is still really hard.
>
>I recall from Beetle days not being able to drill out studs/bolts.
>Really hard metal.
>
>Ben (or list). I see copper nuts in pics. Do they help resist
>corrosion in this application?
>
>Cheers,
>
>Neil.
>
>
>