specifies the testing procedure for new or repaired nutrunners on hard and soft joints.

It defines exactly how simulated hard and soft joints are to progress:

• In a hard joint the final torque must be reached in an angle of less than 27 degrees
  after achieving snug fit threshold. 
  

• In a soft joint the final torque must not be reached until an angle of more than
  650 degrees has been achieved from snug fit threshold, which is 10% of test torque level.
  

• The test torque level relates to the soft joint according to ISO 5393. 

The differences of the nutrunner's shut-off or stall torque between hard and soft joints, as well as the scatter values in each case, indicate the accuracy and quality
of the nutrunner.