The .750" heim or rose joint has a 3/4" shaft and a 3/4" hole in the center ball. Most people will use a spacer that reduces the mounting hole to 5/8"  The 3/4" .750 rod end heim joint is the most common joint used in steering and trackbar or panhard bar applications. They are strong and can handle the forces generated by steering or axle locating.  https://www.heimjoints.net/