Silicon Bronze Torque Values
Want to know the torque values of your silicon bronze bolts, hex cap screws, tapping bolts, carriage bolts, fin neck bolts, and more? 651 and 655 bronzes are both incredibly strong and importantly, incredibly corrosion resistant as well as being highly conductive. These non-ferrous alloys are popular for use in the boat building, electrical, and water treatment industries and are prized for those exceptional qualities.
The torque values of bronze bolts can be found below in this handy chart:
| Bronze Bolt Size | Torque Value (in-lbs) |
| 2-56 | 2.3 |
| 2-64 | 2.8 |
| 4-40 | 4.8 |
| 4-48 | 6.1 |
| 5-40 | 7.1 |
| 5-44 | 8.7 |
| 6-32 | 8.9 |
| 6-40 | 11.2 |
| 8-32 | 18.4 |
| 8-36 | 20.4 |
| 10-24 | 21.2 |
| 10-32 | 29.3 |
| 1/4"-20 | 68.8 |
| 1/4"-28 | 87 |
| 5/16"-18 | 123 |
| 5/16"-24 | 131 |
| 3/8"-16 | 219 |
| 3/8"-24 | 240 |
| 7/16"-14 | 349 |
| 7/16"-20 | 371 |
| Bronze Bolt Size | Torque Value (ft-lbs) |
| 1/2"-13 | 42 |
| 1/2"-20 | 53 |
| 9/16"-12 | 58 |
| 9/16"-18 | 86 |
| 5/8"-11 | 96 |
| 5/8"-18 | 118 |
| 3/4"-10 | 115 |
| 3/4"-16 | 178 |
| 7/8"-9 | 177 |
| 7/8"-14 | 265 |
| 1-1/8"-7 | 240 |
| 1-1/8"-12 | 383 |
| 1-1/4"-7 | 361 |
| 1-1/4"-12 | 447 |
| 1-1/2"-6 | 822 |
| 1-1/2"-12 | 651 |