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Belleville Washer
These washers have a slightly cupped shape to maintain tension and keep the fastener from loosening. Its ability to resist loosening is superior to most lock washer types.
Other Names: Conical Washer
Metric Dimensions
DIN 6796
| Nominal Dia. | Actual ID | OD | Thickness |
|---|---|---|---|
| M3 | 3.2 | 7 | 0.60 |
| M4 | 4.3 | 9 | 1.00 |
| M5 | 5.3 | 11 | 1.20 |
| M6 | 6.4 | 14 | 1.50 |
| M8 | 8.4 | 18 | 2.00 |
| M10 | 10.5 | 23 | 2.50 |
| M12 | 13 | 29 | 3.00 |
| M14 | 15 | 35 | 3.50 |
| M16 | 17 | 39 | 4.00 |
| M18 | 19 | 42 | 4.50 |
| M20 | 21 | 45 | 5.00 |
| M22 | 23 | 59 | 5.50 |
| M24 | 25 | 56 | 6.00 |
*Dimensions vary greatly for US (Imperial) sizes because there is no standard established