This chart provides common U-bolt dimensions by nominal pipe size and uses lettered measurements that correspond to the diagram below. When selecting a U-bolt, the goal is not just to match the pipe size, but to confirm that the usable dimensions work for the specific pipe, bracket, plate, or mounting surface in the assembly.
| Nominal Pipe Size | Inside Width (A) | Inside Length (C) | Thread Diameter (D) | Thread Length (B) |
|---|---|---|---|---|
| 1/4 in. | 5/8 in. | 1-3/4 in. | 1/4 in. | 3/4 in. |
| 3/8 in. | 3/4 in. | 2 in. | 1/4 in. | 3/4 in. |
| 1/2 in. | 7/8 in. | 2-1/4 in. | 1/4 in. | 3/4 in. |
| 3/4 in. | 1-1/8 in. | 2-1/2 in. | 5/16 in. | 7/8 in. |
| 1 in. | 1-3/8 in. | 2-3/4 in. | 5/16 in. | 7/8 in. |
| 1-1/4 in. | 1-3/4 in. | 3 in. | 3/8 in. | 1 in. |
| 1-1/2 in. | 2 in. | 3-1/4 in. | 3/8 in. | 1 in. |
| 2 in. | 2-1/2 in. | 3-3/4 in. | 3/8 in. | 1 in. |
| 2-1/2 in. | 3 in. | 4-1/4 in. | 1/2 in. | 1-1/4 in. |
| 3 in. | 3-5/8 in. | 4-3/4 in. | 1/2 in. | 1-1/4 in. |
| 3-1/2 in. | 4-1/8 in. | 5-1/4 in. | 1/2 in. | 1-1/4 in. |
| 4 in. | 4-5/8 in. | 5-3/4 in. | 1/2 in. | 1-1/4 in. |
| 5 in. | 5-3/4 in. | 6-3/4 in. | 5/8 in. | 1-1/2 in. |
| 6 in. | 6-3/4 in. | 7-3/4 in. | 5/8 in. | 1-1/2 in. |
| 8 in. | 8-3/4 in. | 9-3/4 in. | 3/4 in. | 1-3/4 in. |
| 10 in. | 10-7/8 in. | 12 in. | 3/4 in. | 1-3/4 in. |
| 12 in. | 12-7/8 in. | 14 in. | 7/8 in. | 2 in. |
| 14 in. | 14-1/8 in. | 15-1/2 in. | 7/8 in. | 2 in. |
| 16 in. | 16-1/8 in. | 17-1/2 in. | 1 in. | 2-1/4 in. |
| 18 in. | 18-1/8 in. | 19-1/2 in. | 1 in. | 2-1/4 in. |
| 20 in. | 20-1/8 in. | 21-1/2 in. | 1 in. | 2-1/2 in. |
| 22 in. | 22-1/8 in. | 23-1/2 in. | 1-1/8 in. | 2-1/2 in. |
| 24 in. | 24-1/8 in. | 25-1/2 in. | 1-1/8 in. | 2-3/4 in. |
| 26 in. | 26-1/8 in. | 27-1/2 in. | 1-1/4 in. | 2-3/4 in. |
| 28 in. | 28-1/8 in. | 29-1/2 in. | 1-1/4 in. | 3 in. |
| 30 in. | 30-1/8 in. | 31-1/2 in. | 1-1/4 in. | 3 in. |
| 32 in. | 32-1/8 in. | 33-1/2 in. | 1-3/8 in. | 3-1/4 in. |
| 34 in. | 34-1/8 in. | 35-1/2 in. | 1-3/8 in. | 3-1/4 in. |
| 36 in. | 36-1/8 in. | 37-1/2 in. | 1-1/2 in. | 3-1/2 in. |
| 38 in. | 38-1/8 in. | 39-1/2 in. | 1-1/2 in. | 3-1/2 in. |
| 40 in. | 40-1/8 in. | 41-1/2 in. | 1-1/2 in. | 3-1/2 in. |
MISUMI USA carries a wide range of fasteners including screws, bolts, nuts, threaded inserts, and more. If you have any questions about fastening concerns for your next project or fix, please feel free to contact our product experts and engineers. For more insights about u-bolts and other manufacturing related articles, be sure to check out articles like Industrial Fasteners Selection Guide, Quick Guide to U-Bolts, and more.
Disclaimer:
The content on this webpage is for informational purposes only. MISUMI makes no guarantees, expressed or implied, regarding the accuracy, completeness, or validity of the information. Performance parameters, tolerances, designs, materials, or processes should not be assumed to reflect third-party suppliers’ or manufacturers’ deliverables within MISUMI’s network. Buyers are responsible for specifying their part requirements.
