2型 全金属锁紧六角法兰螺母 细牙 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 
                      
          细牙全金属锁紧六角法兰螺母          
          Prevailing Torque Type All-metal Hexagon Nuts with Flange with Metric Fine Pitch Thread - Product Grades A and B