The values in this torque chart refer to SAE Grade 2, SAE Grade 5, and SAE Grade 8 bolts. In practice, there are many factors that affect permissible torque including bolt type, thread engagement, and tool accuracy. As such, these values in the chart should be considered reference values only. To ensure appropriate torque is applied to the bolts on your car (or any other project for that matter), consult your owner’s manual or service manual for correct torque specifications. Furthermore, it is important to make sure that you are using a properly calibrated torque wrench to apply torque to ensure accuracy.