Bolt uterlik standert grutte opsjoneel: GB / T5783, GB / T5782, SH / T3404, DIN933, DIN931, ISO4014, ISO4017, UNI5737 / UNI5739 Italjaansk standert, ASME B18.2.3.1m, ASME B18.2.31m, ASME B18.2.35m. .5m B18.2.3.6M metric bûtenste hexagon, ANSI / ASME B18.2.1 en oare standert ôfmjittings.