The correct method of tightening bolts and nuts using a wrench is as follows: Select the right size: Ensure that you select a wrench that matches the size of bolts or nuts to avoid damage or loosening. Hold the wrench: Hold the wrench, making sure the handle is snug and firmly in your hand. Insert the wrench: Align the end of the wrench with the head of the bolt or nut to make sure it fits in. Use force: Turn the wrench with moderate force to tighten the bolt or nut. Be careful not to exert too much force, so as not to break the bolt or damage the nut. Direction: Correctly understand the direction of the thread. Generally speaking, clockwise rotation is used to tighten, counterclockwise rotation is used to loosen. Step by step: Tighten the bolts or nuts successively in a cross manner to ensure uniform tightening force is applied. Use auxiliary tools: For longer or larger bolts or nuts, an expansion lever or socket wrench can be used to provide more force. Check the fastening force: After tightening, use a wrench or torque wrench to check the fastening force of the bolt or nut. It should be noted that it takes skill and experience to properly tighten bolts and nuts with a wrench. If you are not familiar with the operation, it is recommended that a professional or engineer perform the operation to ensure safety and correctness.
