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🔧 Torque Specification Calculator
Calculate recommended torque values for bolts and screws
SAE (Inch) Bolt Torque
⚠️ Important Safety Information
• These are general guidelines. Always consult manufacturer specifications when available.
• Over-torquing can strip threads or break bolts. Under-torquing can cause loosening.
• Use a calibrated torque wrench for critical applications.
• Torque values assume clean, dry threads unless otherwise specified.
ISO Metric Bolt Torque
⚠️ Important Safety Information
• These are general guidelines. Always consult manufacturer specifications when available.
• Over-torquing can strip threads or break bolts. Under-torquing can cause loosening.
• Use a calibrated torque wrench for critical applications.
• Torque values assume clean, dry threads unless otherwise specified.
Recommended Torque Specifications
Quick Reference: Grade 5 Torque Values (ft-lbs, dry)
| Size | Coarse Thread | Fine Thread |
|---|---|---|
| 1/4" | 8 ft-lbs | 9 ft-lbs |
| 5/16" | 17 ft-lbs | 19 ft-lbs |
| 3/8" | 30 ft-lbs | 35 ft-lbs |
| 7/16" | 49 ft-lbs | 55 ft-lbs |
| 1/2" | 75 ft-lbs | 85 ft-lbs |
| 9/16" | 109 ft-lbs | 120 ft-lbs |
| 5/8" | 150 ft-lbs | 167 ft-lbs |
| 3/4" | 266 ft-lbs | 295 ft-lbs |
Metric Class 8.8 Torque Values (Nm, dry)
| Size | Coarse Thread |
|---|---|
| M6 | 10 Nm |
| M8 | 25 Nm |
| M10 | 50 Nm |
| M12 | 85 Nm |
| M14 | 135 Nm |
| M16 | 210 Nm |
| M20 | 410 Nm |