I'd like some 1/2" UNF bushes made up. All the ones I've found are too short. I'm after 2 off 50mm long 22mm OD 1/2" UNF bushes in mild steel. I can offer beer tokens for your time.
Are you screwing a bolt right through or one from each side? It's easier if I tap from each end but if it screws right through that's a non-starter so I'll have to work on how to drive the tap past the square end.
If it's an issue then it doesn't need to go all the way through. It's only going to be bolted from one side. I can always spec the bolts to suit. How far can you tap?