DIN 931 Hexagon head bolts Standard Dimensions, Technical Data and Size Chart Data Table
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- Steel: 8.8,10.9,12.9
- Stainless: A 2
Equivalent norms:
- ISO 4014
- CSN 21101
- PN 82101
- UNI 5737
- EU 24014
Available Finish:
- Black
- Bright Zinc
- Hot Dip Galvanized
Terminology and Measurements
- l – Length of Bolt
- d – The Nominal Diameter of the Thread
- k – Head Height
- e – The Diameter of the Circumscribed Circle
- s – Head Width
- a1 – Length Undercut
- dp – Diameter of the Ejector
- r – Head Radius
- k´ – Minimum Size of the Head on the Key
| Thread size d | p | k | c | r | s | e | b | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min. | max. | DIN 931 | ISO 4014 | DIN 931 | ISO 4014 | (L≤125) | (125| (L>200) | | ||||
| M3 | 0.5 | 2 | 0.15 | 0.4 | 0.1 | 5.5 | 16 | 6.01 | 17.77 | 12 | 18 | - |
| M4 | 0.7 | 2.8 | 0.15 | 0.4 | 0.2 | 7 | 18 | 7.66 | 20.03 | 14 | 20 | - |
| M5 | 0.8 | 3.5 | 0.15 | 0.5 | 0.2 | 8 | 21 | 8.79 | 23.36 | 16 | 22 | - |
| M6 | 1 | 4 | 0.15 | 0.5 | 0.25 | 10 | 10 | 11.05 | 11.05 | 18 | 24 | - |
| M8 | 1.25 | 5.3 | 0.15 | 0.6 | 0.4 | 13 | 13 | 14.38 | 14.38 | 22 | 28 | - |
| M10 | 1.5 | 6.4 | 0.15 | 0.6 | 0.4 | 17 | 17 | 18.9 | 18.9 | 26 | 32 | 45 |
| M12 | 1.75 | 7.5 | 0.15 | 0.6 | 0.6 | 19 | 19 | 21.1 | 21.1 | 30 | 36 | 49 |
| M14 | 2 | 8.8 | 0.15 | 0.6 | 0.6 | 22 | 22 | 24.49 | 24.49 | 34 | 40 | 53 |
| M16 | 2 | 10 | 0.2 | 0.8 | 0.6 | 24 | 24 | 26.75 | 26.75 | 38 | 44 | 57 |
| M18 | 2.5 | 11.5 | 0.2 | 0.8 | 0.6 | 27 | 27 | 30.14 | 30.14 | 42 | 48 | 61 |
| M20 | 2.5 | 12.5 | 0.2 | 0.8 | 0.8 | 30 | 34 | 33.53 | 37.72 | 46 | 52 | 65 |
| M22 | 2.5 | 14 | 0.2 | 0.8 | 0.8 | 32 | 32 | 38.85 | 38.85 | 50 | 56 | 69 |
| M24 | 3 | 15 | 0.2 | 0.8 | 0.8 | 36 | 36 | 39.98 | 39.98 | 54 | 60 | 73 |
| M27 | 3 | 17 | 0.2 | 0.8 | 1 | 41 | 41 | 45.2 | 45.2 | 60 | 66 | 79 |
| M30 | 3.5 | 18.7 | 0.2 | 0.8 | 1 | 46 | 46 | 50.85 | 50.85 | 66 | 72 | 85 |
| M36 | 4 | 22.5 | 0.2 | 0.8 | 1 | 55 | 55 | 60.79 | 60.79 | - | 84 | 97 |
| M42 | 4.5 | 26 | 0.3 | 1 | 1.2 | 65 | 65 | 71.3 | 71.3 | - | 96 | 109 |
| M48 | 5 | 30 | 0.3 | 1 | 1.6 | 75 | 75 | 82.6 | 82.6 | - | 108 | 121 |
| M56 | 5.5 | 35 | 0.3 | 1 | 2 | 85 | 85 | 93.56 | 93.56 | - | - | 137 |
| M64 | 6 | 40 | 0.3 | 1 | 2 | 95 | 95 | 104.9 | 104.9 | - | - | 153 |