Din Iso 2768 =link= -

| Nominal Size Range | f (Fine) | m (Medium) | c (Coarse) | v (Very coarse) | | :--- | :--- | :--- | :--- | :--- | | 0.5 up to 3 | ±0.2 | ±0.2 | ±0.4 | ±0.4 | | >3 up to 6 | ±0.5 | ±0.5 | ±1.0 | ±1.0 | | >6 up to 30 | ±1.0 | ±1.0 | ±2.0 | ±2.0 | For larger than 30 mm, tolerances are agreed separately or use linear dimension tolerances. 1. Scope This part applies to geometrical tolerances (straightness, flatness, perpendicularity, symmetry, runout) for features that are not individually tolerance on the drawing. 2. Tolerance Classes (3 Classes) | Class | Description | | :--- | :--- | | H | Precision | | K | Standard (most common) | | L | Rough | 3. General Tolerances for Straightness and Flatness (mm) | Nominal Length Range (mm) | H | K | L | | :--- | :--- | :--- | :--- | | up to 10 | 0.02 | 0.05 | 0.1 | | >10 up to 30 | 0.05 | 0.1 | 0.2 | | >30 up to 100 | 0.1 | 0.2 | 0.4 | | >100 up to 300 | 0.2 | 0.4 | 0.8 | | >300 up to 1000 | 0.3 | 0.6 | 1.2 | | >1000 up to 3000 | 0.4 | 0.8 | 1.6 | 4. General Tolerances for Perpendicularity (mm) Perpendicularity tolerance = the value from the straightness/flatness table, but applied to the shorter side.

The standard you are referring to is and DIN ISO 2768-2 . din iso 2768

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) |