What is rundown torque?

Rundown torque refers to the amount of torque applied to a fastener, such as a bolt or screw, during the initial tightening process before it reaches its final installed position. It is crucial in ensuring that the fastener is adequately seated and that the joint achieves the desired clamping force. Proper rundown torque helps prevent issues like stripping, over-tightening, or under-tightening, which can affect the integrity of the assembly. It is typically measured and specified in torque specifications for various applications.