here is my tang. can I thread it like this? or do I have to round it, or weld on a rod? do I need special dies to thread the hardened steel?
Can't see your pic, but I didn't weld anything, I cut 2 corners off so it had a stem about 3/8" long and roughly equal side on all all four sides. Than I used my crap belt sander to make that stem round, than I threaded it with a cheep tap and die from harbor freight that broke the first time.
For the cap end I used a chopped off piece of steel from bar stock, drilled and tapped it.
I threaded that on last with the last couple pieces of leather, like in the video