Metric
(DIN 127B / ISO 12944)
| Size | ID (mm) | OD (mm) | Height (mm) |
|---|---|---|---|
| M3 | 3.1 | 6.2 | 1.6 |
| M4 | 4.1 | 7.6 | 1.8 |
| M5 | 5.1 | 9.2 | 2.4 |
| M6 | 6.1 | 11.8 | 3.2 |
| M8 | 8.1 | 14.8 | 4.0 |
| M10 | 10.2 | 18.1 | 4.4 |
| M12 | 12.2 | 21.1 | 5.0 |
Imperial
ASME B18.21.1 - Helical Spring Lock Washers (Regular)
| Size | ID (in) | OD (in) | Thickness (in) |
|---|---|---|---|
| #4 | 0.114 | 0.209 | 0.025 |
| #6 | 0.141 | 0.250 | 0.031 |
| #8 | 0.167 | 0.293 | 0.040 |
| #10 | 0.193 | 0.334 | 0.047 |
| 1/4" | 0.252 | 0.487 | 0.062 |
| 5/16" | 0.314 | 0.583 | 0.078 |
| 3/8" | 0.377 | 0.680 | 0.094 |
| 1/2" | 0.502 | 0.869 | 0.125 |