[国际]
ISO 4775-1984 高强度钢结构栓接用B级 六角螺母(大对边) 8、10级 Hexagon nuts for high-strength structural boltinig with large width across flats—Product grades B—Property classes 8 and 10
7
[国际]
ISO 7413-1984 热镀锌1 型(超尺寸攻丝)结构栓接用六角螺母 Hexagon nuts for structural bolting, style 1, hot-dip galvanized(over tapped)—Productgrades A and B—Property classes 5,6 and 8
8
[国际]
ISO 7414-1984 高强度螺栓用1型B级六角螺母 Hexagon nuts for structural bolting with large width across flats,style 1-Product grade B