Which tool do you use to tighten a nut or bolt to a given amount of pressure?

A torque wrench is specifically designed to apply a precise amount of pressure or torque to nuts and bolts. It features a mechanism that allows the user to set a specific torque value, ensuring that the fasteners are tightened to the manufacturer’s specifications without being over-tightened, which could cause damage or failure. This makes it an essential tool for applications where exact torque settings are critical, such as in automotive repair or construction.

In contrast, a socket wrench is meant for turning fasteners but does not provide feedback on the applied torque, making it less suitable for applications requiring precision. An adjustable wrench also allows for turning nuts and bolts, but similarly lacks the capability to measure torque. An Allen wrench, designed for hexagonal screws, is limited to specific types of fasteners and does not ascertain the amount of torque applied either. Therefore, for the specific need of tightening a nut or bolt to a predetermined level of pressure, the torque wrench is the appropriate tool.