Steve
I think you'll like the CD machine studs if
they work. They have a nice little point on
the face of the stud centerline which lets you
center them on a punch mark.
All-thread, cut to length with a simple screw cutter.
http://www.hansonrivet.com/ might be able to run you a few batches.
--
Steve W.
The studs need to have a head on them as that is where the stud welder makes
electrical contact with them.
Steve