Loosening torque refers to the torque that must be applied to loosen a screw, nut, or other component after it has been tightened. It is an important parameter in the assembly and disassembly of bolted connections and can make the difference between a successful or failed assembly.

The loosening torque can depend on various factors such as the type of thread, the size of the component and the type of lubricant used during assembly. It is commonly measured in Newton meters (Nm) or foot-pounds (ft-lb) and is an important parameter to ensure that bolted connections are not over or under tightened.

Too little loosening torque can cause a screw connection to loosen itself, which can lead to malfunctions or even dangerous situations. On the other hand, too high a loosening torque can cause the thread to be damaged or the component to fail. It is therefore important to determine the correct loosening torque for each screw connection and monitor this carefully to ensure safe and reliable assembly.