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Din 439 Check Nuts are standard nuts with a reduced height in comparison to the hexagon full nut. Also known as ‘check’ nuts; they are commonly used with any male fastener with the same thread diameter and pitch, used to mate a stack or single part together.
Standard Followed for DIN 439 Check Nuts
- BS 3692
- BS 57
- IS/ 1363
- IS/ 1367
All measurements in millimeters (mm)
| d1 | s | e | m |
|---|---|---|---|
| M2 | 4 | 4.32 | 1.2 |
| M3 | 5.5 | 6.01 | 1.8 |
| M4 | 7 | 7.66 | 2.2 |
| M5 | 8 | 8.79 | 2.7 |
| M6 | 10 | 11.05 | 3.2 |
| M8 | 13 | 14.38 | 4 |
| M10 | 17 | 18.9 | 5 |
| M12 | 19 | 21.1 | 6 |
| M14 | 22 | 24.49 | 7 |
| M16 | 24 | 26.75 | 8 |
| M18 | 27 | 29.56 | 9 |
| M20 | 30 | 32.95 | 10 |
| M22 | 32 | 35.03 | 11 |
| M24 | 36 | 39.55 | 12 |
| M27 | 41 | 45.2 | 13.5 |
| M30 | 46 | 50.85 | 15 |
| M33 | 50 | 55.37 | 16.5 |
| M36 | 55 | 60.79 | 18 |