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Khoom siv
Cov bolts tau txhais hauv ANSI B1.13M rau Qib 6 g kam rau ua.Cov khoom siv Bolt tau ua raws li ASTM F568M rau Chav Kawm 4.6.Cov khoom siv rau corrosion resistant bolts tau ua raws li ASTM F 568M rau Chav Kawm 8.83.bolts.Kev kho saum npoo yuav tsum ua raws li AASHTO M232.
