Establishes rules for the conversion of inch dimensions into millimetres and vice versa, and applies mainly to toleranced dimensions where accuracy of conversion is essential to ensure interchangeability, use of original gauges, identity of fits, etc.; non-toleranced dimensions and their conversions are also dealt with. Tables of exact millimetre equivalents of inch values from 0.001 to 999 in. and of inch equivalents of millimetre values from 0.001 to 999 mm to seven decimal places are included, and also tables covering the conversion of feet to metres and vice versa. Illustrated examples of conversions are provided and the Standard also includes definitions of some of the more important terms covering sizing, tolerances, etc.
