EN 1667Prevailing torque type all-metal hexagon nuts with flange, with metric fine pitch thread
GB/T 6187.2Prevailing torque type all-metal hexagon nuts with flange, style 2,Fine pitch thread
JIS B1199-4-2.1Prevailing torque type all-metal hexagon nuts with flange with metric fine pitch thread-Table 2-1
NF E25-507Prevailing torque type all-metal hexagon nuts with flange with metric fine pitch thread
Q 331Prevailing torque type all-metal hexagon nuts with flange with fine thread