All too aware of threads not matching up on old items, the easy way out as far as i could see was to call it 'gunsmith threads' because they resembled what he produced for that particular task, many were filed in.
Generally if you asked for a bolt or nut you would be supplied with course thread ie M10 X 1.5mm pitch.
Even the US are moving towards accepting metric threading, like us most machines made elsewhere and i think thats the key.
Generally if you asked for a bolt or nut you would be supplied with course thread ie M10 X 1.5mm pitch.
Even the US are moving towards accepting metric threading, like us most machines made elsewhere and i think thats the key.