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din25201
Torque-Preload Curve (DIN 25201)
Tightening torque vs. preload for DIN 25201 double-stacked lock washers from M3 to M48. Torque grows quadratically (~d³) with bolt diameter, computed at friction coefficient μ=0.12.
Standard Condition Curve
Curve variants across specs × materials. Register to view.
Standard Condition Curve
| Parameter | Value | Unit |
|---|---|---|
| Material | 42CrMo4 | — |
| mu | 0.12 | — |
| nominal_dia | M12 | — |