I recently bought a 2017 MIM P-Bass for a reasonably good price. I started trying some different strings on it which lead me to adjusting the truss rod. When I inserted the hex wrench into the truss rod nut, it felt a little mushy so I stopped immediately. I used a flashlight to check out the hex head and sure enough, the head was starting to strip. I stopped immediately, and ordered a new part. The part arrived, so I carefully removed the old truss rod nut, and I saw that I had made a good call - the head was just at that point where is could have become a problem. The threads of the old nut are in great condition, it was only the head that was the problem. Looking down at the end of the truss rod, I could see that it was a little off center. Not a lot but just enough that the new nut will not engage with the threads of the truss rod. I confirmed that my new nut was the correct part. I even reinserted the old nut as a test to see if it would engage and it would not. I was wondering if anyone had any suggestions on how I might get the nut to engage the the threads on the truss rod. I don't want to do anything that might damage the threads.