| Thread size | Pitch | Thickness | Washer Diameter | Across Flats |   |
M10 | 1.50 | 9.5 | 22.0 | 17.0 | M12 | 1.75 | 14.5 | 27.0 | 19.0 | M16 | 2.00 | 19.5 | 39.0 | 24.0 |
| Size | Inside Diameter | Outside Diameter | Thickness |   |
M10 | 10.5 | 50.0 | 3.0 | M12 | 13.0 | 50.0 | 3.0 | M16 | 17.0 | 80.0 | 3.0 |
| To suit sizes M10, M12, M16 |   |
| Size |   |
M10 | M12 | M16 |