The ball seat is not quite the same as stock 14" steel Vanagon wheels.
The diameter of the hole is the same. The diameter of the ball they are
machined to fit is smaller. There is a guy on Samba selling hybrid nuts
needed to properly match the diameter of the smaller ball with the
larger diameter lug hole.

http://www.thesamba.com/vw/classifieds/detail.php?id=656981

My guess is that one could use the stock ball nuts and just let them
flatten the angle of the holes to match. My worry would be that over
time the nuts would loosen so checking them  from time to time might be
a good idea. I would probably use different nuts myself.

Mark

Mike S wrote:
> At 08:56 AM 12/24/2008, Chris S wrote...
>> Are those conical or ball lug nut seats?
>
> Ball seats. They look identical to the ones on the stock wheels - the
> lug bolts fit great.
>
>