DINReplaced → ISO 4014Draft · single source
DIN 931
Hexagon head bolts, partially threaded
- Head · drive
- Hexagon head · External hexagon (spanner)
- Thread
- Metric ISO coarse thread, partial
- Tolerance
- 6g
- Property classes
- 5.65.88.810.912.9A2A4
- Materials
- SteelStainlessBrass
Replaced by
ISO 4014Current · Draft
Not identical: the width across flats differs for M10 (DIN 17 → ISO 16 mm), M12 (19 → 18 mm), M14 (22 → 21 mm) and M22 (32 → 34 mm); other sizes are unchanged. Other dimensions (e.g. head or nut height) can also differ.
What changed · s
| Size | DIN 931 | ISO 4014 | Δ |
|---|---|---|---|
| M10 | 17 | 16 | −1 |
| M12 | 19 | 18 | −1 |
| M14 | 22 | 21 | −1 |
| M22 | 32 | 34 | +2 |
Source: Würth DIN→ISO changeover list · mm
Dimensions
mm · values as the standard states them| Size | P | s | e | k | b125 < l ≤ 200 | bl > 200 | bl ≤ 125 | c | r |
|---|---|---|---|---|---|---|---|---|---|
| M3 | 0.5 | 5.5 | 6.01 | 2 | 18 | — | 12 | 0.15 – 0.4 | 0.1 |
| M4 | 0.7 | 7 | 7.66 | 2.8 | 20 | — | 14 | 0.15 – 0.4 | 0.2 |
| M5 | 0.8 | 8 | 8.79 | 3.5 | 22 | — | 16 | 0.15 – 0.5 | 0.2 |
| M6 | 1 | 10 | 11.05 | 4 | 24 | — | 18 | 0.15 – 0.5 | 0.25 |
| M8 | 1.25 | 13 | 14.38 | 5.3 | 28 | — | 22 | 0.15 – 0.6 | 0.4 |
| M10 | 1.5 | 17 | 18.9 | 6.4 | 32 | 45 | 26 | 0.15 – 0.6 | 0.4 |
| M12 | 1.75 | 19 | 21.1 | 7.5 | 36 | 49 | 30 | 0.15 – 0.6 | 0.6 |
| M14 | 2 | 22 | 24.49 | 8.8 | 40 | 53 | 34 | 0.15 – 0.6 | 0.6 |
| M16 | 2 | 24 | 26.75 | 10 | 44 | 57 | 38 | 0.2 – 0.8 | 0.6 |
| M18 | 2.5 | 27 | 30.14 | 11.5 | 48 | 61 | 42 | 0.2 – 0.8 | 0.6 |
| M20 | 2.5 | 30 | 33.53 | 12.5 | 52 | 65 | 46 | 0.2 – 0.8 | 0.8 |
| M22 | 2.5 | 32 | 38.85 | 14 | 56 | 69 | 50 | 0.2 – 0.8 | 0.8 |
| M24 | 3 | 36 | 39.98 | 15 | 60 | 73 | 54 | 0.2 – 0.8 | 0.8 |
| M27 | 3 | 41 | 45.2 | 17 | 66 | 79 | 60 | 0.2 – 0.8 | 1 |
| M30 | 3.5 | 46 | 50.85 | 18.7 | 72 | 85 | 66 | 0.2 – 0.8 | 1 |
| M36 | 4 | 55 | 60.79 | 22.5 | 84 | 97 | — | 0.2 – 0.8 | 1 |
| M42 | 4.5 | 65 | 71.3 | 26 | 96 | 109 | — | 0.3 – 1 | 1.2 |
| M48 | 5 | 75 | 82.6 | 30 | 108 | 121 | — | 0.3 – 1 | 1.6 |
| M56 | 5.5 | 85 | 93.56 | 35 | — | 137 | — | 0.3 – 1 | 2 |
| M64 | 6 | 95 | 104.9 | 40 | — | 153 | — | 0.3 – 1 | 2 |
Ranges read min – max; ≤ / ≥ where the standard gives one limit, ≈ for approximate values. Sizes in (brackets) are non-preferred. Select a row for its size sheet.