A torque wrench is used to tighten a bolt when?

A torque wrench is specifically designed to apply a precise amount of torque to a fastener, such as a bolt. Using a torque wrench ensures that the fastener is tightened to the manufacturer’s specifications, which is crucial for the integrity of the assembly. When the exact amount of force is required, it prevents both under-tightening, which could lead to loosening or failure of the joint, and over-tightening, which can damage the bolt or the material it is being fastened to.

In situations where the proper torque specification is critical—such as in automotive applications or structural assemblies—a torque wrench is the preferred tool to achieve the necessary tension without compromising safety or functionality. This precision is particularly important in maintaining the integrity and performance of mechanical systems.