Carriage Bolt
Standard Size for Metric Round Head Square Neck Bolts |
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| Size | Pitch | dk | ds | f | k | r1 | r2 | r3 | v | ||||||
| Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Ref. | Max. | Max. | Min. | Max. | |||
| M5 | 0.8 | 12.45 | 13.55 | 4.52 | 5 | 2.9 | 4.1 | 2.7 | 3.3 | 10.7 | 0.5 | 0.57 | 4.52 | 5.48 | |
| M6 | 1 | 15.45 | 16.55 | 5.52 | 6 | 3.4 | 4.6 | 3.12 | 3.88 | 12.6 | 0.5 | 0.9 | 5.52 | 6.48 | |
| M8 | 1.25 | 19.35 | 20.65 | 7.42 | 8 | 4.4 | 5.6 | 4.12 | 4.88 | 16 | 0.5 | 1.2 | 7.42 | 8.58 | |
| M10 | 1.5 | 23.35 | 24.65 | 9.42 | 10 | 5.4 | 6.6 | 4.62 | 5.38 | 19.2 | 0.5 | 1.5 | 9.42 | 10.58 | |
| M12 | 1.75 | 29.35 | 30.65 | 11.3 | 12 | 7.25 | 8.75 | 6.05 | 6.95 | 24.1 | 1 | 1.8 | 11.3 | 12.7 | |
| M16 | 2 | 37.2 | 38.8 | 15.3 | 16 | 11.1 | 12.9 | 8.05 | 8.95 | 29.3 | 1 | 2.4 | 15.3 | 16.7 | |
Standard Size for Inch Round Head Square Neck Bolts |
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| Basic Bolt Diameter | E | A | H | O | P | |||||||||
| Body Diameter | Head Diameter | Head Height | Square Width | Square Depth | ||||||||||
| Max. | MIn. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | |||||
| 10 | 0.1900 | 0.199 | 0.182 | 0.469 | 0.438 | 0.114 | 0.094 | 0.199 | 0.185 | 0.125 | 0.094 | |||
| 1/4 | 0.2500 | 0.260 | 0.237 | 0.594 | 0.563 | 0.145 | 0.125 | 0.260 | 0.245 | 0.156 | 0.125 | |||
| 5/6 | 0.3125 | 0.324 | 0.298 | 0.719 | 0.688 | 0.176 | 0.156 | 0.324 | 0.307 | 0.187 | 0.156 | |||
| 3/8 | 0.3750 | 0.388 | 0.360 | 0.844 | 0.782 | 0.208 | 0.188 | 0.388 | 0.368 | 0.219 | 0.188 | |||
| 7/16 | 0.4375 | 0.452 | 0.421 | 0.969 | 0.907 | 0.239 | 0.219 | 0.452 | 0.431 | 0.250 | 0.219 | |||
| 1/2 | 0.5000 | 0.515 | 0.483 | 1.094 | 1.032 | 0.270 | 0.250 | 0.515 | 0.492 | 0281 | 0.250 | |||
| 5/8 | 0.6250 | 0.642 | 0.605 | 1.344 | 1.219 | 0.344 | 0.313 | 0.642 | 0.616 | 0.344 | 0.313 | |||
| 3/4 | 0.7500 | 0.768 | 0.729 | 1.594 | 1.469 | 0.406 | 0.375 | 0.768 | 0.741 | 0.406 | 0.375 | |||
