| METRIC - Carriage Bolts (ISO 8677; DIN 603; JIS B 1171) | |||||||||||||
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Nominal Diameter Click on Size to Shop Products |
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O |
C |
P |
A |
H |
L1 |
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Square Width Across Flats |
Square |
Square
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Head Diameter
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Head Height
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Thread |
Thread Length |
Thread Length |
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| mm | Max | Min | Min | Max | Min | Max | Min | Max | Min | Ref | Ref | Ref | |
| M5 | 0.8 | 5.48 | 4.52 | 5.9 | 4.1 | 2.9 | 13 | 11.9 | 3.1 | 2.5 | 16 | 20 | - |
| M6 | 1 | 6.48 | 5.52 | 7.2 | 4.6 | 3.4 | 16 | 14.9 | 3.6 | 3 | 18 | 24 | - |
| M8 | 1.25 | 8.58 | 7.42 | 9.6 | 5.6 | 4.4 | 20 | 18.7 | 4.8 | 4 | 22 | 28 | 41 |
| M10 | 1.5 | 10.58 | 9.42 | 12.2 | 6.6 | 5.4 | 24 | 22.7 | 5.8 | 5 | 26 | 32 | 45 |
| M12 | 1.75 | 12.7 | 11.3 | 14.7 | 8.8 | 7.2 | 30 | 28.7 | 6.8 | 6 | 30 | 36 | 49 |
| M16 | 2 | 16.7 | 15.3 | 19.9 | 12.9 | 11.1 | 38 | 36.4 | 8.9 | 8 | 38 | 44 | 57 |
| M20 | 2.5 | 20.84 | 19.16 | 24.9 | 15.9 | 14.1 | 46 | 44.4 | 10.9 | 10 | 46 | 52 | 65 |
| Tolerance on Length | 20-33mm: ±1.05 | 35-50mm: ±1.25 | 55-80mm: ±1.5 | ||||||||||
| 90-120mm: ±1.75 | 130-150mm: ±2.0 | 160-180mm: ±4.0 | 200mm:±4.6 | ||||||||||
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A round head, self-anchoring bolt and a metric thread pitch with a square neck under the head. |
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Applications/ Advantages |
The square neck is intended to ensure that the bolt does not turn as a nut is tightened. |
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Steel |
Stainless |
| Class 4.6 carriage bolts are produced of carbon steel that conforms to the following chemical composition - Carbon: 0.55% maximum; Phosphorus: 0.05% maximum; Sulfur: 0.06% maximum. |
A2-50 and A4-50 |
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| Hardness |
Rockwell B 67 - 99.5 (Vickers HV 120 - 250) |
- |
| Yield Strength |
240 N/mm2 minimum |
30,450 psi. |
| Tensile Strength |
400 N/mm2 minimum |
72,500 psi. |
| Plating |
See table for more info. |
Typically, stainless carriage bolts are provided without extra finishes. |
Additional Resources
