2e0poz,
thats what I meant to say. Just the most common or standard threads would be 6, 8 or 10. Although I do have a set of 7mm x 1mm somewhere that I used for repairing an old machine which was scrapped a while ago. One day they might come in useful again.
10mm x 1mm or metric fine I come across alot. It seems to be quite common on some machines.