scope:

This Interantional Standard gives the principles of symbolization and indication on technical drawings of tolerances of form, orientation, location, and run-out, and establishes the appropiate geometrical definitions. Hence the term "geometrical tolerances" will be used in this document as synonymous with these groups of tolerances. Geometrical tolerances shall be specified only where they are essential, that is, in the light of functional requirements, interchangeability and probable manufacturing circumstances. Indicating geometrical tolerances does not necessarily imply the use of any particular method of production, measurement or gauging.