Bolt irisi boṣewa iwọn iyan: GB/T5783, GB/T5782, SH/T3404, DIN933, DIN931, ISO4014, ISO4017, UNI5737/UNI5739 Italian bošewa, ASME B18.2.3.1m, ASME B18.2.3.18m.2, ASME B18.2.3.5m. .5m B18.2.3.6M metric lode hexagon, ANSI / ASME B18.2.1 ati awọn miiran boṣewa mefa.