What does the audible "click" from a torque wrench signify?

The audible "click" from a torque wrench signifies that the desired torque has been reached. Torque wrenches are designed to provide a mechanical feedback signal, often in the form of a click, when the preset value is achieved. This feature is crucial, as it allows the user to maintain the correct amount of tension on fasteners without over-tightening, which can lead to damage or failure of components. The click acts as a reliable indicator, ensuring that the user can work efficiently while maintaining precision in their adjustments.

When using a torque wrench, it's important to rely on this audible signal to ensure bolts and other fasteners are tightened to the manufacturer's specifications, thereby promoting safety and performance in aviation structures. The engineering design of the torque wrench incorporates this click feature specifically to enhance user confidence in achieving the accurate torque setting.