Product review (5 stars): It fit.
Not much more to say. It fit and worked. I ordered this just to make sure I could re-assemble everything. I did not know if taking the nut off would bugger-up the threads. As it turned out, my drive block was fine, but I put this new one on because I ordered it. I'm glad I decided to take the drum out. There was a lot of build-up between the two drums and that was causing some drag.