ISO 10512 - 1997 1型细牙六角尼龙锁紧螺母 6级、8级、10级 Prevailing torque type hexagon nuts(with non-metallic insert),style 1, with metric fine pitch thread—Property classes 6,8 and 10
ISO 10512 - 2012 细牙六角尼龙锁紧螺母 6级、8级、10级 Prevailing Torque Type Hexagon Regular Nuts(With Non-Metallic Insert) With Metric Fine Pitch Thread - Property Classes 6,8 And 10