Torx Screw Recommended Torque Reference (M3-M10)

torx screw Recommended Torque Reference (M3-M10)

Correct tightening torque is key to reliable torx joints. Too low causes loosening; too high yields or strips. Below are dry, unlubricated reference values; adjust for friction and design requirements.

Grade 8.8 Carbon Steel Torx

M3 about 1.2-1.5 N·m, M4 about 2.7-3.2, M5 about 5.5-6.5, M6 about 9.5-11, M8 about 23-27, M10 about 46-52. Automated lines should use mid-range values and run CPK verification.

A2-70 Stainless Torx

Stainless galling easily; recommended torque is about 60%-70% of carbon steel: M4 about 1.8-2.2, M5 about 3.8-4.5, M6 about 6.5-8. Use anti-seize and avoid repeated disassembly.

Notes

Torque is affected by coating, lubrication and clamped material. Critical joints should be validated by testing for target torque and angle, with periodic tool calibration.

Torxscrew provides matching screws and torque validation advice.