Look up torque values for any bolt size and grade. Calculated from ISO 898-1 and SAE J429 standards.
Proof loads and stress areas come directly from ISO 898-1 and SAE J429 — the same standards engineers reference worldwide.
Every torque value is computed using T = K × D × F, with the clamp load set to 75% of proof load per standard engineering practice.
Our computed values are cross-checked against published torque charts from major fastener suppliers to ensure accuracy.