Yes, socket*less* cap screws. As in no hole to insert a hex key, but other wise
the same shape and height as the head on a socket head cap screw. Roughly 5/16"
to 3/8" X short, standard or metric, course or fine thread, grade, material
unimportant. Does have to be metal... Thought about ordering shoulder bolts and
cutting the head off. May end up going this route but looking for a less
expensive and labor intensive solution since I may need as many as 50.

Could possibly live with an acorn head if it lacked wrench flats, but prefer
the cylindrical over bullet shape.
--
William