Final Torque

Final torque is the torque value applied at the end of tightening, when a fastener has been seated and tightened to its specified target. It represents the completed tightening step used to achieve the intended clamp load in the joint. Final torque is typically the number listed on an assembly drawing, work instruction, or torque chart, and it is applied after the fastener turns smoothly through the earlier seating phase.

Final torque matters because it is directly tied to joint reliability and safety. If final torque is too low, the joint may not develop enough clamp load to resist vibration, leakage, or fatigue. If final torque is too high, the fastener can yield, strip threads, crush the clamped materials, or break. Final torque specifications should match the actual installation conditions, including lubrication, coatings, and washer or nut type, since changes in friction can significantly change the clamp load produced at a given torque.

Learn more about final torque vs. initial torque.