Thread diameter and inner diameter, has its own standards, some users will be specially on thread diameter tolerance annotation is not necessary (except there is a requirement for specific use of outside diameter), under the table, with metric coarse thread thread diameter in MM: metric external thread 60 ° coarse thread thread diameter table:
| Size | Pitch | Diameter of thread | Rub and roll the diameter of the teeth | |
| Max | Min | ±0.02 | ||
| M1.4 | 0.3 | 1.38 | 1.34 | 1.16 |
| M1.7 | 0.35 | 1.68 | 1.61 | 1.42 |
| M2.0 | 0.4 | 1.98 | 1.89 | 1.68 |
| M2.3 | 0.4 | 2.28 | 2.19 | 1.98 |
| M2.5 | 0.45 | 2.48 | 2.38 | 2.15 |
| M3.0 | 0.5 | 2.98 | 2.88 | 2.6 |
| M3.5 | 0.6 | 3.47 | 3.36 | 3.02 |
| M4.0 | 0.7 | 3.98 | 3.83 | 3.4 |
| M4.5 | 0.75 | 4.47 | 4.36 | 3.88 |
| M5.0 | 0.8 | 4.98 | 4.83 | 4.3 |
| M6.0 | 1 | 5.97 | 5.82 | 5.18 |
| M7.0 | 1 | 6.97 | 6.82 | 6.18 |
| M8.0 | 1.25 | 7.96 | 7.79 | 7.02 |
| M9.0 | 1.25 | 8.96 | 8.79 | 8.01 |
| M10 | 1.5 | 9.96 | 9.77 | 8.84 |
| M11 | 1.5 | 10.97 | 10.73 | 9.84 |
| M12 | 1.75 | 11.95 | 11.76 | 10.7 |
| M14 | 1.75 | 13.95 | 13.74 | 12.5 |
| M16 | 2 | 15.95 | 15.74 | 14.5 |
| M18 | 2 | 17.95 | 17.71 | 16.2 |
| M20 | 2.5 | 19.95 | 19.71 | 18.2 |
