My shiney new nut arrived this morning less than a day after ordering it.
I tried to fit it but at first the nut wouldn’t catch the thread. On close examination it was obvious that the steering column had been hammered hard on the end a number of times and was slightly out of shape. I used a small triangular file to open out the thread and gently filed the outside threads where any bulging was likely, eventually and with a lot of mussle the nut went on and tightened fully. It’s extremely tight, but thats a good thing , yes?