ISO 7044:2012 Preview
Prevailing torque type all-metal hexagon nuts with flange, style 2 -- Product grades A and B
This standard was last reviewed and confirmed in 2017. Therefore this version remains current.
ISO 7044:2012 specifies the characteristics of prevailing torque type all-metal hexagon nuts with flange (style 2) and threads M5 to M20 inclusive, in product grade A for threads up to and including M16 and product grade B for threads above M16, and with property classes 8, 9, 10 and 12.