[Rick Parker]

Try this, I did this for the jamb nuts used throughout the rod ends in my suspension, it is esthetically pleasing:
Get a 7/16 stainless jamb nut, run it on to a 7/16 tap then have a machinist chuck it in a chuck type steady rest on a lathe and then clamp the nut (with the tap centering it) into the chuck, then drill and tap for the 1/2" size. You can then also "thin" it down by various means if you want to. The finished overall size iwill be much easier on you eyes and will feel better in your hand.
This could also be done by putting 2 "flats" 180 degrees apart on a piece of round stock (in a Mill) and then drilling and tapping and parting off a piece (in a lathe) the thickness you desire. Not hard to do if the proper tools are available.