Screw threads, overview
Name Designation/ Nominal diameter Standard Application example M M to DIN 14, part 1 Watches and ISOmetric thread mm to part 4 fine work (60° thread angle) M 30 1 to 68 mm DIN 13, part 1 General engineering ISO 68 (coarse thread) ISO261/262 ISO 724/965 M 20x1 1 to DIN 13, part 2 General engineering