Does turning a car screw clockwise tighten or loosen it?

1 Answers
DiSara
07/29/25 11:20pm
Turning a car screw clockwise tightens it. Below is relevant information about car screws: Design reason: The majority of screws are designed with right-hand threads due to ergonomic principles. The speed direction relative to the rotation axis follows the right-hand rule, and over 90% of people are right-handed, making it more convenient for the majority. Additionally, right-hand threads are easier to manufacture, especially in large-thread turning processes. Important notes: Screws are critical fasteners in automobiles. The tightness and tightening sequence of these fasteners are extremely strict; otherwise, they may pose safety hazards.
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