ISO 12125 - 2012 细牙六角尼龙法兰锁紧螺母 A型和B型 Prevailing Torque Type Hexagon Nuts With Flange(With Non-Metallic Insert) With Metric Fine Pitch Thread,style 2 - Product Grades A And B
ISO 12126 - 2012 细牙全金属锁紧六角法兰螺母 A型和B型 Prevailing Torque Type All - Metal Hexagon Nuts With Flange With Metric Fine Pitch Thread,Style 2 - Product Grades A And B
ISO 12125 - 1997 细牙六角尼龙法兰锁紧螺母 A级、B级 Prevailing Torque Type Hexagon Nuts With Flange(With Non-metallic Insert) With Metricfine Pitch Thread - Product Grades A and B