The following guidelines are meant to help you identify pitfalls related to the tightening of bolted joints. Use the right tool: Ensure that a calibrated torque tool is used and that a torque value is specified on the tightening specification. Be aware that certain automatic tightening tools, such as impact wrenches, can result in significant variations occurring in the torque value and the preload of bolts. Therefore, use a calibrated torque tool for the final tightening operation or inspection.
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