TorqueSpec
Bolt torque database

Coarse vs Fine Thread Torque

Thread pitch affects stress area, which affects torque. Compare coarse and fine thread torque specifications for every metric bolt size.

M3 — 0.5mm vs 0.35mmM4 — 0.7mm vs 0.5mmM5 — 0.8mm vs 0.5mmM6 — 1.0mm vs 0.75mmM7 — 1.0mm vs 0.75mmM8 — 1.25mm vs 1.0mmM10 — 1.5mm vs 1.25mmM12 — 1.75mm vs 1.25mmM14 — 2.0mm vs 1.5mmM16 — 2.0mm vs 1.5mmM18 — 2.5mm vs 1.5mmM20 — 2.5mm vs 1.5mmM22 — 2.5mm vs 1.5mmM24 — 3.0mm vs 2.0mmM27 — 3.0mm vs 2.0mmM30 — 3.5mm vs 2.0mmM33 — 3.5mm vs 2.0mmM36 — 4.0mm vs 3.0mmM39 — 4.0mm vs 3.0mmM42 — 4.5mm vs 3.0mmM45 — 4.5mm vs 3.0mmM48 — 5.0mm vs 3.0mmM52 — 5.0mm vs 4.0mmM56 — 5.5mm vs 4.0mmM64 — 6.0mm vs 4.0mm