Using a Torque Wrench

Run Down Resistance

To overcome the difficulty of properly reading torque wrenches where you have a condition of damaged threads or when you're using certain types of lock nuts to produce a run-down resistance, simply add the torque resistance to the manufacturer's specifications.

Be sure run-down resistance is measured on the last rotation, because in the case of damaged threads or rusted threads, if they become polished off at this point, a corrected reading would be necessary.

The ideal situation is, of course, to clean all parts and correct the run-down resistance problem if it is not engineered into the fastener product.

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