I have an 1/8” copper bar, and two 6AWG ring terminals to connect to my master contractor. Even with a thin jam nut, I’m left with only one thread showing when tightened. I tried replacing the thicker nut already on the contractor with a jam nut, but the stud on the contractor gets loose when that nut is loosened, so I’m reluctant to remove that nut. What is an acceptable method to get these three thickish bits together on the contractor. Oh, yeah, the starter contractor has the same issue, so switching to that post doesn’t help.