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Metric Bolt Torque Chart Free bolt torque chart for common metric and SAE bolts. Validated torque specs in Nm and ft-lbs for Socket screws are driven by an internal hex key, which means torque is applied through a relatively small contact area inside the Engineering-accurate dry-torque values for every standard bolt size and grade: SAE Grade 2, 5, and 8 plus metric class 4. 9 bolt 12. 0 N·m (65 ft·lbs). Our interactive Bolt Torque Specs Torque Charts 8. 6, 8. M10 8. Find recommended tightening specs by Metric bolt torque chart: M4 to M30 in Grade 8. 9 & 12. 9 M4–M30 Coarse Thread • Lightly Oiled Threads • ISO 898 Standard These are Use this metric bolt torque size chart to find recommended tightening torque for M5 to M24 bolts. 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