Bl This standard establishes a System of Tolerances and Discrepancies for parts in general, for groups of diameters up to 500 mm. B-2 This standard sets the numerical values of the fundamental tolerances and discrepancies for groups of diameters up to 500 mm. B-3 This standard establishes the rules according to which the values appearing in the tables of tolerances and fundamental discrepancies are rounded.
IRAM 5002-1965 history
1965IRAM 5002-1965 Basic tolerance and deviation size 500mm is sufficient