DIN 913 / ISO 4026 flat point set screw: dimensions
Hexagon socket set screw with flat point, from M3 to M24.
DIN 913 / ISO 4026 set screw dimensions
| Size | Pmm | snom, mm | emin, mm | tmin, mm | tshort l, mm | dpmax, mm |
|---|---|---|---|---|---|---|
| M3 | 0.5 | 1.5 | 1.73 | 2 | 1.2 | 2 |
| M4 | 0.7 | 2 | 2.3 | 2.5 | 1.5 | 2.5 |
| M5 | 0.8 | 2.5 | 2.87 | 3 | 2 | 3.5 |
| M6 | 1 | 3 | 3.44 | 3.5 | 2 | 4 |
| M8 | 1.25 | 4 | 4.58 | 5 | 3 | 5.5 |
| M10 | 1.5 | 5 | 5.72 | 6 | 4 | 7 |
| M12 | 1.75 | 6 | 6.86 | 8 | 4.8 | 8.5 |
| M16 | 2 | 8 | 9.15 | 10 | 6.4 | 12 |
| M20 | 2.5 | 10 | 11.43 | 12 | 8 | 15 |
| M24 | 3 | 12 | 13.72 | 15 | 10 | 18 |
Dimensions in millimetres unless stated. Select a row to load its CAD files above.
DIN 913 socket depth
The set screw is threaded over its whole length and the length includes the point. The socket is less deep in the shortest lengths of each size; the table gives both depths.
Grub screw sizes and points
A grub screw is sized like any metric screw, by its thread and length. The point decides how it holds: the flat point (this page) presses on a flat or a shaft without marking it much, the cone point locates in a drilled dimple, and the cup point bites into the surface. At M6 all three take a 3 mm key.
DIN 913 set screws: common questions
- What key fits an M6 grub screw?
- A 3 mm hexagon key, for flat, cone and cup point set screws alike.