ISO 2768 general tolerance table
Linear dimensions, radii and chamfers for classes f, m, c and v.
Linear dimensions (mm)
| Size (mm) | f fine | m medium | c coarse | v very coarse |
|---|---|---|---|---|
| 0.5 to 3 | ±0.05 | ±0.1 | ±0.2 | – |
| over 3 to 6 | ±0.05 | ±0.1 | ±0.3 | ±0.5 |
| over 6 to 30 | ±0.1 | ±0.2 | ±0.5 | ±1 |
| over 30 to 120 | ±0.15 | ±0.3 | ±0.8 | ±1.5 |
| over 120 to 400 | ±0.2 | ±0.5 | ±1.2 | ±2.5 |
| over 400 to 1000 | ±0.3 | ±0.8 | ±2 | ±4 |
| over 1000 to 2000 | ±0.5 | ±1.2 | ±3 | ±6 |
| over 2000 to 4000 | – | ±2 | ±4 | ±8 |
External radii and chamfer heights (mm)
| Size (mm) | f and m | c and v |
|---|---|---|
| 0.5 to 3 | ±0.2 | ±0.4 |
| over 3 to 6 | ±0.5 | ±1 |
| over 6 | ±1 | ±2 |
Source: ISO 2768-1:1989 table 1 and 2, as reproduced at amesweb.info (checked 2026-10-03). For one size: ISO 2768 calculator.