Geometric tolerances apply to the shape, orientation, and relationship of features. Class H represents the tightest accuracy band. Straightness and Flatness
To legally enforce these guidelines, you must state the standard clearly on the blueprint. This is typically placed inside or directly adjacent to the drawing title block. The standard notation format is: or ISO 2768 - m - h iso 2768-mh tolerance chart
| Nominal Size Range (mm) | Tolerance Class | | :--- | :--- | | | m (Medium) | | 0.5 up to 3 | ±0.2 | | over 3 up to 6 | ±0.5 | | over 6 | ±1 | Geometric tolerances apply to the shape, orientation, and