Mwonekano wa bolt ukubwa wa kawaida wa hiari: GB/T5783, GB/T5782, SH/T3404, DIN933, DIN931, ISO4014, ISO4017, UNI5737/UNI5739 kiwango cha Italia, ASME B18.2.3.1m, ASME B18.2.3.5m. .5m B18.2.3.6M heksagoni ya nje ya metric, ANSI/ASME B18.2.1 na vipimo vingine vya kawaida.