Pinned for butt cap then. OK.hole to put a pin through
You do not need a machinist. You do need some files, a vise and patience. If the tang is hardened, you may need to use a grinder (or a diamond stone/file) to do the cleanup on it and may need to anneal the end of the tang if you want to thread it.The only issue I have, not a machinist!
Trying to find a machinist to do it is the hard part.