DIN 933 / ISO 4017 hex screw: dimensions and CAD files
Hexagon head screw threaded up to the head, from M3 to M24. Choose the size and the length to get its dimensions and CAD files.
DIN 933 / ISO 4017 dimensions
| Size | Pmm | snom, mm | knom, mm | emin, mm | cmax, mm | dwmin, mm |
|---|---|---|---|---|---|---|
| M3 | 0.5 | 5.5 | 2 | 6.01 | 0.4 | 4.57 |
| M4 | 0.7 | 7 | 2.8 | 7.66 | 0.4 | 5.88 |
| M5 | 0.8 | 8 | 3.5 | 8.79 | 0.5 | 6.88 |
| M6 | 1 | 10 | 4 | 11.05 | 0.5 | 8.88 |
| M8 | 1.25 | 13 | 5.3 | 14.38 | 0.6 | 11.63 |
| M10 | 1.5 | 16 | 6.4 | 17.77 | 0.6 | 14.63 |
| M12 | 1.75 | 18 | 7.5 | 20.03 | 0.6 | 16.63 |
| M14 | 2 | 21 | 8.8 | 23.36 | 0.6 | 19.64 |
| M16 | 2 | 24 | 10 | 26.75 | 0.8 | 22.49 |
| M18 | 2.5 | 27 | 11.5 | 30.14 | 0.8 | 25.34 |
| M20 | 2.5 | 30 | 12.5 | 33.53 | 0.8 | 28.19 |
| M22 | 2.5 | 34 | 14 | 37.72 | 0.8 | 31.71 |
| M24 | 3 | 36 | 15 | 39.98 | 0.8 | 33.61 |
Where DIN 933 differs from ISO 4017
| Size | sISO 4017 | sDIN 933 |
|---|---|---|
| M10 | 16 | 17 |
| M12 | 18 | 19 |
| M14 | 21 | 22 |
| M22 | 34 | 32 |
DIN 933 is withdrawn but parts to it are still sold. Only the sizes listed here differ; in every other size both standards give the same part. Pick the standard in the selector above to get the matching CAD files.
Dimensions in millimetres unless stated. Select a row to load its CAD files above.
ISO 4017 vs DIN 933: the width across flats
DIN 933 was replaced by ISO 4017. The head height is the same, but the width across flats changes in four sizes: M10 goes from 17 to 16 mm, M12 from 19 to 18 mm, M14 from 22 to 21 mm and M22 from 32 to 34 mm. The main table follows ISO 4017; the DIN 933 sizes that differ are listed below it and have their own CAD files.
DIN 933 vs DIN 931
DIN 933 is threaded right up to the head. DIN 931 (ISO 4014) has the same head but a plain shank under it, with the thread only on the last part, which suits joints where the plain shank takes the shear load. DIN 931 starts at longer lengths than DIN 933, so for short screws the fully threaded version is the one available.
DIN 933 weight
The selector shows the approximate mass of each screw where two catalogues agree on it; those values come from the mass tables of DIN 933. It is not shown for M10, M12, M14 and M22 in the ISO version, because the published table belongs to the DIN head with its different width across flats.
DIN 933 screws: common questions
- What spanner does an M8 hex screw take?
- 13 mm, in both DIN 933 and ISO 4017. The head is 5.3 mm high.
- Is DIN 933 the same as ISO 4017?
- Except for the width across flats of M10, M12, M14 and M22, yes. Those four sizes take a different spanner, and each version has its own files here.