1.1 This standard covers the mechanical and performance requirements for prevailing torque type steel metric hex and hex flange nuts,
– With hex nut nominal thread diameters M3 thru M36;
– With hex flange nut nominal thread diameters M6 thru M20;
– With specific strength requirements;
– For application within the following temperature ranges:
• all-metal, plain – minus 50°C to plus 300°C
• all-metal, plated – minus 50°C to plus 230°C
• nonmetallic insert – minus 50°C to plus 120°C.
1.2 This standard does not apply to nuts requiring special properties such as:
• weldability;
• corrosion resistance;
• ability to perform at temperatures outside the ranges specified in 1.1.
1.3 Unless otherwise noted, all references to nuts in this standard mean prevailing-torque hex nuts and hex flange nuts.