This standard establis es the methods and means for the verification of torque wrenches with an upper measurement limit up to 2.5 kN.m (250 kgf.m) from 1st to 4th class.
NC 90-08-10-1987 history
1987NC 90-08-10-1987 Metrological Assurance. Dynamometrie Wrenches. Verification Methods and Means