Angular dimensions (e.g., 45° chamfer): ±1° for the "m" class. Part 2 of ISO 2768 defines general geometrical tolerances (straightness, flatness, perpendicularity, symmetry, and runout). Here, "K" indicates the Medium class for geometry.
| Nominal Length Range | Straightness / Flatness | Perpendicularity | | :--- | :--- | :--- | | ≤ 10 mm | 0.05 mm | 0.1 mm | | >10 – 30 mm | 0.1 mm | 0.2 mm | | >30 – 100 mm | 0.2 mm | 0.3 mm | | >100 – 300 mm | 0.3 mm | 0.4 mm | | >300 – 1000 mm | 0.5 mm | 0.6 mm | | >1000 – 3000 mm | 0.8 mm | 0.8 mm | ıso 2768 mk
| Nominal Dimension Range | Tolerance (m – Medium) | | :--- | :--- | | 0.5 – 3 mm | ±0.1 mm | | >3 – 6 mm | ±0.1 mm | | >6 – 30 mm | ±0.2 mm | | >30 – 120 mm | ±0.3 mm | | >120 – 400 mm | ±0.5 mm | | >400 – 1000 mm | ±0.8 mm | | >1000 – 2000 mm | ±1.2 mm | Angular dimensions (e