... version 2) Length: 40 ~ 180mm 3) Dia.: 16, 20, 22, 24mm High Strength Bolt SUPPLIER:Standard: GB/T3632-1995 version Length: 40 ... ~ 180mm Dia.: 16, 20, 22, 24mmGrade: 4.8S, 5 ... quality,large production capacity,timely delivery,competitive price High Strength Bolt