Checked at the local dealer during lunch.  He shows the parts,
described in the EKTA as a "self locking nut".  8mm.

The parts guy then went on to say that their techs typically re-use
the nuts, and use loctite on them, because nobody wants to wait 3 days
for a few nuts.

Allan

Allan Streib <streib@cs.indiana.edu> writes:

> Now we're getting somewhere.  Good info.  I'm going to check at the
> dealer -- who knows, they may have a drawer full of them.
>
> http://www.boltdepot.com/product.aspx?cc=15&cs=204&cm=70
>
> The illustration there does not look quite like what I removed, so I'm
> not certain that this is correct.  It is a 10.9 grade though.
>
> Allan