First, a crucial clarification: The DIN ISO designation indicates that a German standard (DIN) has adopted an international standard (ISO) without changes.
| Nominal Size Range | f (Fine) | m (Medium) | c (Coarse) | v (Very coarse) | | :--- | :--- | :--- | :--- | :--- | | 0.5 up to 3 | ±0.05 | ±0.1 | ±0.2 | — | | >3 up to 6 | ±0.05 | ±0.1 | ±0.3 | ±0.5 | | >6 up to 30 | ±0.1 | ±0.2 | ±0.5 | ±1.0 | | >30 up to 120 | ±0.15 | ±0.3 | ±0.8 | ±1.5 | | >120 up to 400 | ±0.2 | ±0.5 | ±1.2 | ±2.5 | | >400 up to 1000 | ±0.3 | ±0.8 | ±2.0 | ±4.0 | | >1000 up to 2000 | ±0.5 | ±1.2 | ±3.0 | ±6.0 | | >2000 up to 4000 | — | ±2.0 | ±4.0 | ±8.0 | Values for "v" (Very coarse) start at >3 mm. 4. Permissible Deviations for Angular Dimensions (degrees/minutes) For nominal length of the shorter leg of the angle. din iso 2768
| Nominal Length Range (mm) | f / m | c / v | | :--- | :--- | :--- | | up to 10 | ±1° | ±1°30' | | >10 up to 50 | ±0°30' | ±1° | | >50 up to 120 | ±0°20' | ±0°30' | | >120 up to 400 | ±0°10' | ±0°15' | | >400 | ±0°5' | ±0°10' | For classes f and m, the same table applies. For c and v, the same table applies (wider). 5. Permissible Deviations for Radii and Chamfer Heights For nominal radius or chamfer height (in mm). Tolerance = ± value. First, a crucial clarification: The DIN ISO designation