DIN 571 hexagon head wood screw (coach screw): dimensions
Hexagon head wood screw with a plain shank and a pointed wood thread. The size is the shank diameter in mm.
DIN 571 dimensions
| d | snom, mm | knom, mm | emin, mm | damax, mm | dsmin, mm |
|---|---|---|---|---|---|
| 5 | 8 | 3.5 | 8.63 | 6 | 4.52 |
| 6 | 10 | 4 | 10.89 | 7.2 | 5.52 |
| 8 | 13 | 5.5 | 14.2 | 10.2 | 7.42 |
| 10 | 17 | 7 | 18.72 | 12.2 | 9.42 |
| 12 | 19 | 8 | 20.88 | 15.2 | 11.3 |
| 16 | 24 | 10 | 26.17 | 19.2 | 15.3 |
Dimensions in millimetres unless stated. Select a row to load its CAD files above.
DIN 571 CAD model: head, shank and point
The head and shank follow the table. The wood thread itself is not drawn, because no public table gives its pitch consistently; the files show the shank and the cone point.
Lag screw dimensions
The size is the shank diameter in millimetres, not a metric thread. An 8 mm coach screw takes a 13 mm spanner and has a head 5.5 mm high. The lengths with files here run from 25 to 120 mm for that size.
DIN 571 coach screws: common questions
- What spanner fits an 8 mm coach screw?
- 13 mm for DIN 571, the same as an M8 hex bolt.