It's funny that you post this because I thought I got some steel ones in 24tpi from Pat a few weeks ago. I know your going to blow me off, but I'd try a little more force on the axle, and with a generous amount of grease, and see what happens. I know you know how to put on a nut, so do I, but I had a problem threading on some new ones, hence I think the threads may be pretty sharp and Blue Six is prolly going off the same specs as the steel ones that come from Nankai. After I gave mine a little force they went on fine. Good luck, Robby