This International Standard specifies the characteristics of prevailing torque type all-metal hexagon nuts, of style 2, with threads from M5 up to and including M36, in product grade A for threads up to and including M16, and product grade B for threads o
DS/ISO 7720:2012 history
2012DS/ISO 7720:2012 Prevailing torque type all-metal hexagon nuts, style 2 - Property class 9
1986DS/ISO 7720:1986 Prevailing torque type all-metal hexagon nuts, style 2. Property class 9