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Carriage Bolt
Features a smooth domed head and a square portion protruding from under the head. The square prevents the bolt from turning when tightening when inserted into a matching square hole.
Dimensions
ASME B18.5
| Thread Dia. | Head Dia. | Square Width | Square Depth |
|---|---|---|---|
| No. 10 | 0.436 - 0.469 | 0.185 - 0.199 | 0.094 - 0.125 |
| 1/4 | 0.563 - 0.594 | 0.245 - 0.260 | 0.125 - 0.156 |
| 5/16 | 0.688 - 0.719 | 0.307 - 0.324 | 0.156 - 0.187 |
| 3/8 | 0.782 - 0.844 | 0.368 - 0.388 | 0.188 - 0.219 |
| 7/16 | 0.907 - 0.969 | 0.431 - 0.452 | 0.219 - 0.250 |
| 1/2 | 1.032 - 1.094 | 0.492 - 0.515 | 0.250 - 0.281 |
| 5/8 | 1.219 - 1.344 | 0.616 - 0.642 | 0.313 - 0.344 |
| 3/4 | 1.469 - 1.594 | 0.741 -0.768 | 0.375 - 0.406 |