M4 Bolt Torque — 3 ft-lbs (4.1 N·m)
Reference Class 8.8 torque for a M4 hex bolt: 3 ft-lbs (4.1 N·m). Lubricated: 2 ft-lbs (3 N·m).
Result
Answer
3 ft-lbs (4.1 N·m)
Standard
Torque3 ft-lbs / 4.1 N·m
Torque (lubricated est.)2 ft-lbs / 3 N·m
Bolt ClassClass 8.8
ThreadM4x0.7
Recommended Drive1/4" drive
A M4x0.7 Class 8.8 bolt: reference torque 3 ft-lbs (4.1 N·m). Lubricated estimate: 2 ft-lbs (3 N·m). Always verify with the fastener manufacturer and use a calibrated torque wrench.
Note
Reference value from published fastener data. Always verify with the fastener manufacturer for critical applications.
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About M4 Bolt Torque
An M4 hex bolt (Class 8.8): reference torque is 3 ft-lbs (4.1 N·m), with a lubricated estimate of 2 ft-lbs (3 N·m). Standard thread pitch is 0.7mm. Use a 1/4" drive torque wrench. Actual torque depends on thread condition, lubrication, and joint design — always verify with the fastener manufacturer.