I’m an engineer, not a tool and die guy. However, even if you had rod stock, and dies to cut threads on them, how do you propose adding a head to make a bolt?
And then, how do you plan on hardening that bolt?
I’m all for being able to DIY in case of SHTF, but in this case I think I’d rather stockpile bolts (remembering that long ones can be cut shorter), nuts, washers and lock washers.
Good advise..