Standard Bolt Torque
General torque values for standard SAE Grade 5 and Grade 8 bolts. These are general guidelines only — always use the manufacturer's specifications when available. Values assume clean, dry threads with no lubricant.
Grade 5 Bolts (3 radial lines on head)
| Bolt Size | Coarse (ft-lbs) | Fine (ft-lbs) |
|---|---|---|
| 1/4"-20 / 1/4"-28 | 8 | 10 |
| 5/16"-18 / 5/16"-24 | 17 | 19 |
| 3/8"-16 / 3/8"-24 | 31 | 35 |
| 7/16"-14 / 7/16"-20 | 49 | 55 |