DIN 440
DIN 440 – Flat Washers with round/square hole.
DIN 440 V – Square hole flat Washers
DIN 440 R – Round hole flat washers
Dimension of DIN 440 Flat Washers with Round/Square hole as below:
 |
| Size | d1 | d2 | s |
| M5 | 5.5 | 18 | 2 |
| M6 | 6.6 | 22 | 2 |
| M8 | 9 | 28 | 3 |
| M10 | 11 | 34 | 3 |
| M12 | 13.5 | 44 | 4 |
| M16 | 17.5 | 56 | 5 |
| M20 | 22 | 72 | 6 |
| M22 | 24 | 80 | 6 |
| M24 | 26 | 85 | 6 |
| M27 | 30 | 98 | 6 |
| M30 | 33 | 105 | 6 |
| M33 | 36 | 112 | 6 |
| M36 | 39 | 125 | 8 |