Torque and safety

Threaded fasteners, which are used to attach parts to aircraft structures, come in thousands of shapes and sizes, many of them specialized and specific to certain aircraft. These fasteners require torque to properly perform the required task. A torque is a twisting moment produced around a point when a force is applied to a lever arm positioned at a distance from that point. The torque value should be specified on the drawing, in the production requirements or directly in the work instructions.