1026 Cold Rolled Steel Hex Tube adapter 7/8" -14tpi
If you are ever wanting to adjust whatever you are making with these it is worth it to pay a little more and get the hex. Can speak from experience.
Great weld in bung and nice to be able to tighten jam nuts and adjust control arms with just a twist.
Work like a charm for tightening jam nuts. Wish I had bought these when I first built my steering.