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United Titanium manufactures and inventories round head square neck (carriage) bolts from #10 to 1” diameter. We also have metric carriage bolts available upon request. These carriage bolts are manufactured to the most recent ASME B18.5, IFI, or customer stated standards with full or partial thread options. Our inventory is home to thousands of these carriage bolts in any of our various materials and sizes.
| E | A | H | O | |||||
| NOMINAL SIZE | BODY DIA. | HEAD DIA. | HEAD HEIGHT |
SQUARE WIDTH |
||||
| MAX | MIN | MAX | MIN | MAX | MIN | MAX | MIN | |
| No. 10 | 0.199 | 0.182 | 0.469 | 0.436 | 0.114 | 0.094 | 0.199 | 0.185 |
| 1/4 | 0.260 | 0.237 | 0.594 | 0.563 | 0.145 | 0.125 | 0.260 | 0.245 |
| 5/16 | 0.324 | 0.298 | 0.719 | 0.688 | 0.176 | 0.156 | 0.324 | 0.307 |
| 3/8 | 0.388 | 0.360 | 0.844 | 0.782 | 0.208 | 0.188 | 0.388 | 0.368 |
| 7/16 | 0.452 | 0.421 | 0.969 | 0.907 | 0.239 | 0.219 | 0.452 | 0.431 |
| 1/2 | 0.515 | 0.483 | 1.094 | 1.032 | 0.270 | 0.250 | 0.515 | 0.492 |
| 5/8 | 0.642 | 0.605 | 1.344 | 1.219 | 0.344 | 0.313 | 0.642 | 0.616 |
| 3/4 | 0.768 | 0.729 | 1.594 | 1.469 | 0.406 | 0.375 | 0.768 | 0.741 |
| 7/8 | 0.895 | 0.852 | 1.844 | 1.719 | 0.459 | 0.438 | 0.895 | 0.865 |
| 1 | 1.022 | 0.976 | 2.094 | 1.969 | 0.531 | 0.500 | 1.022 | 0.990 |
| TITANIUM | ZIRCONIUM | ALLOY | TANTALUM | |
| CP-TI (GR. 2) | 702 | 600 | UT35N | |
| 6AL-4V (GR. 5) | 705 | 625 | 556 | |
| TI-PD (GR. 7) | 825 | 718 | ||
| TI CODE 12 (GR. 12) | C276 | AL6XN | ||
| 6AL-4V ELI (GR. 23) | C22 | 2205 | ||
| B2 | 686 | |||
| B3 | 255 | |||
Our carriage bolt dimensions are listed in inches, but we also offer metric carriage bolts upon request.