I would clean up the
stub axle , try getting the NEW peen nut onto the thread , looks like that could cause a few problems to start with , then I'd assemble the rest , then if the nut can be tighten up PASSED all the stripped thread and all the way on plus a few and the bearing was happy then I would be happy with it , saying that I would be looking for a GOOD second hand one to replace it but thats just me.
Martin / OldieButGoodie please keep things civil
