DIN 7984 low head socket cap screw: dimensions
Socket head cap screw with a lower head and smaller socket than ISO 4762, for tight spaces.
DIN 7984 dimensions
| Size | Pmm | dkmax, mm | kmax, mm | snom, mm | emin, mm | tnom, mm | damax, mm | rmin, mm | bref, mm |
|---|---|---|---|---|---|---|---|---|---|
| M3 | 0.5 | 5.5 | 2 | 2 | 2.3 | 1.5 | 3.6 | 0.1 | 12 |
| M4 | 0.7 | 7 | 2.8 | 2.5 | 2.87 | 2.3 | 4.7 | 0.2 | 14 |
| M5 | 0.8 | 8.5 | 3.5 | 3 | 3.44 | 2.7 | 5.7 | 0.2 | 16 |
| M6 | 1 | 10 | 4 | 4 | 4.58 | 3 | 6.8 | 0.25 | 18 |
| M8 | 1.25 | 13 | 5 | 5 | 5.72 | 3.8 | 9.2 | 0.4 | 22 |
| M10 | 1.5 | 16 | 6 | 7 | 8.01 | 4.5 | 11.2 | 0.4 | 26 |
| M12 | 1.75 | 18 | 7 | 8 | 9.15 | 5 | 13.7 | 0.6 | 30 |
| M16 | 2 | 24 | 9 | 12 | 13.72 | 5.5 | 17.7 | 0.6 | 38 |
| M20 | 2.5 | 30 | 11 | 14 | 16 | 7.5 | 22.4 | 0.8 | 46 |
| M24 | 3 | 36 | 13 | 17 | 19.44 | 8 | 26.4 | 0.8 | 54 |
Dimensions in millimetres unless stated. Select a row to load its CAD files above.
DIN 7984 vs DIN 912
DIN 7984 keeps the head diameter of DIN 912 but makes the head lower and the socket smaller. At M8 the head is 5 mm high instead of 8 mm, and it takes a 5 mm key instead of 6 mm. That saves height in counterbores and tight spaces, at the cost of a lower tightening torque.
There is no ISO equivalent with the same dimensions. If you need the low head and the full-size key, see DIN 6912.
DIN 7984 screws: common questions
- What key fits a DIN 7984 M8 screw?
- A 5 mm hexagon key. The DIN 912 screw of the same size takes 6 mm.