1.25" Rod End 12(TPI)125RE-1
This Heim has a 1.25" shaft with a 1" bore. The reason we use the 1" bore instead of a 1.25" bore is strength. There is simply more material on the 1" bore rod end and with a 3/4" bolt, after missalignment that is what you would end up with anyway. If you need a 1.25" rod end, you don't want a small bolt becoming the weak point. Sometimes smaller in the right places is better!
There are many benefits to a 1 piece Rod End that you should understand. The first and foremost is simply Strength but the simplicity of having less parts to come loose or break on the trail or in competition comes in a close second. Anyone can buy the parts to make a rod end. They're pretty easy to come by and you don't need a very expensive special 800 ton press to manufacture them. If they screw together. However, there is a reason the 1 piece rod ends have been the chosen ones for so long.