DIN 931 Hex Bolts (Metric)
ASTM A193 Grade B7 Specifications
ASTM A193 Grade B7 Specifications
| Size | Width Across Flat (s) | Head Height (k) | Thread Length | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DIN 931 | ISO 4014 | DIN 931 | ISO 4014 | DIN 931 Length (in MM) | ISO 4014 Length (in MM) | |||||||||
| Min | Max | Min | Max | Min | Max | Min | Max | ≥125 | >125≥200 | ≥200 | ≥125 | >125≥200 | ≥200 | |
| M2 | 3.82 | 4.00 | 3.82 | 4.00 | 1.28 | 1.52 | 1.275 | 1.525 | 10 | - | - | 10 | - | - |
| M3 | 5.32 | 5.50 | 5.32 | 5.50 | 1.88 | 2.12 | 1.875 | 2.125 | 12 | - | - | 12 | - | - |
| M4 | 6.78 | 7.00 | 6.78 | 7.00 | 2.68 | 2.92 | 2.675 | 2.925 | 14 | - | - | 14 | - | - |
| M5 | 7.78 | 8.00 | 7.78 | 8.00 | 3.35 | 3.65 | 3.35 | 3.65 | 16 | 22 | - | 16 | - | - |
| M6 | 9.78 | 10.00 | 9.78 | 10.00 | 3.85 | 4.15 | 3.85 | 4.15 | 18 | 24 | - | 18 | - | - |
| M8 | 12.73 | 13.00 | 12.73 | 13.00 | 5.15 | 5.45 | 5.15 | 5.45 | 22 | 28 | 41 | 22 | - | - |
| M10 | 16.73 | 17.00 | 15.73 | 16.00 | 6.22 | 6.58 | 6.22 | 6.58 | 26 | 32 | 45 | 26 | - | - |
| M12 | 18.67 | 19.00 | 17.73 | 18.00 | 7.32 | 7.68 | 7.32 | 7.68 | 30 | 36 | 49 | 30 | - | - |
| M14 | 21.67 | 22.00 | 20.67 | 21.00 | 8.62 | 8.98 | 8.62 | 8.98 | 34 | 40 | 53 | 34 | 40 | - |
| M16 | 23.67 | 24.00 | 23.67 | 24.00 | 9.82 | 10.2 | 9.82 | 10.18 | 38 | 44 | 57 | 38 | 44 | - |
| M18 | 26.67 | 27.00 | 26.67 | 27.00 | 11.28 | 11.7 | 11.285 | 11.715 | 42 | 48 | 61 | 42 | 48 | - |
| M20 | 29.67 | 30.00 | 29.67 | 30.00 | 12.28 | 12.7 | 12.285 | 12.715 | 46 | 52 | 65 | 46 | 52 | - |
| M22 | 31.61 | 32.00 | 33.38 | 34.00 | 13.78 | 14.2 | 13.785 | 14.215 | 50 | 56 | 69 | 50 | 56 | 69 |
| M24 | 35.38 | 36.00 | 35.38 | 36.00 | 14.78 | 15.2 | 14.785 | 15.215 | 54 | 60 | 73 | 54 | 60 | 73 |
| M27 | 40.00 | 41.00 | 40.00 | 41.00 | 16.65 | 17.4 | 16.65 | 17.35 | 60 | 66 | 79 | 60 | 66 | 79 |
| M30 | 45.00 | 46.00 | 45.00 | 46.00 | 18.28 | 19.1 | 18.28 | 19.12 | 66 | 72 | 85 | 66 | 72 | 85 |
| M33 | 49.00 | 50.00 | 49.00 | 50.00 | 20.58 | 21.4 | 20.58 | 21.42 | 72 | 78 | 91 | - | 78 | 91 |
| M36 | 53.80 | 55.00 | 53.80 | 55.00 | 22.08 | 22.9 | 22.08 | 22.92 | 78 | 84 | 97 | - | 84 | 97 |
| M39 | 58.80 | 60.00 | 58.80 | 60.00 | 24.58 | 25.4 | 24.58 | 25.42 | 84 | 90 | 103 | - | 90 | 103 |
| M42 | 63.10 | 65.00 | 63.10 | 65.00 | 25.58 | 26.4 | 25.58 | 26.42 | 90 | 96 | 109 | - | 96 | 109 |
| M45 | 68.10 | 70.00 | 68.10 | 70.00 | 27.58 | 28.4 | 27.58 | 28.42 | 96 | 102 | 115 | - | 102 | 115 |
| M48 | 73.10 | 75.00 | 73.10 | 75.00 | 29.58 | 30.4 | 29.58 | 30.42 | 102 | 108 | 121 | - | 108 | 121 |
| M52 | 78.10 | 80.00 | 78.10 | 80.00 | 32.5 | 33.5 | 32.5 | 33.5 | - | 116 | 129 | - | 116 | 129 |
| M56 | 82.80 | 85.00 | 82.80 | 85.00 | 34.5 | 35.5 | 34.5 | 35.5 | - | 124 | 137 | - | - | 137 |
| M60 | 87.80 | 90.00 | 87.80 | 90.00 | 37.5 | 38.5 | 37.5 | 38.5 | - | 132 | 145 | - | - | 145 |
| M64 | 92.80 | 95.00 | 92.80 | 95.00 | 39.5 | 40.5 | 39.5 | 40.5 | - | 140 | 153 | - | - | 153 |
| M72 | 102.80 | 105.00 | -- | -- | 44.5 | 45.5 | -- | -- | - | 156 | 169 | - | - | - |
