DIN 439 specifies hexagonal thin (lock) nuts designed for use in confined spaces or applications requiring double nut configurations. Their slim profile allows them to be easily used on top of standard nuts to prevent loosening. The hexagonal head design enables straightforward tightening and loosening with standard tools. DIN 439 nuts are commonly utilized in automotive, mechanical engineering, and general industrial applications. They are manufactured from high-strength materials such as steel or stainless steel and are available in various size options.
| d | ⬢ | m min. | s | e |
|---|---|---|---|---|
| M3 | 5,5 | 1,55 | 5,5 | 6,01 |
| M4 | 7 | 1,95 | 7 | 7,66 |
| M5 | 8 | 2,45 | 8 | 8,79 |
| M6 | 10 | 2,90 | 10 | 11,05 |
| M8 | 13 | 3,70 | 13 | 14,38 |
| M10 | 17 | 4,70 | 17 | 18,90 |
| M12 | 19 | 5,70 | 19 | 21,10 |
| M14 | 22 | 6,42 | 22 | 24,49 |
| M16 | 24 | 7,42 | 24 | 26,75 |
| M18 | 27 | 8,42 | 27 | 29,56 |
| M20 | 30 | 9,10 | 30 | 32,95 |
| M22 | 32 | 9,90 | 32 | 35,03 |
| M24 | 36 | 10,90 | 36 | 39,55 |