Standardna velikost videza vijaka izbirno: GB/T5783, GB/T5782, SH/T3404, DIN933, DIN931, ISO4014, ISO4017, UNI5737/UNI5739 italijanski standard, ASME B18.2.3.1m, ASME B18.2.3.5m, ASME B18.2.3 .5m B18.2.3.6M metrični zunanji šesterokotnik, ANSI/ASME B18.2.1 in druge standardne mere.