On Fri, 13 Sep 2013 06:31:05 -0700 (PDT), "
wrote:

What about just chucking up hex headed bolts in your lathe and turning the head to be round?

Too short and high head bolts like the shoulder bolts I mentioned up
thread are expensive and harder to find.

No lathe, then clamp a bit to the drill press table and use your drill press as a lathe.

Yup, have several hand 'lathes' which don't involve kneeling down like
the drill press 'lathe'. 4" angle grinder with a sanding disk beats a
file almost every time.
--
William