In which direction should an Allen wrench be turned to tighten a set screw?

To tighten a set screw using an Allen wrench, you should turn the wrench clockwise. This is a fundamental principle in mechanics, where turning a fastener in a clockwise direction tightens it by drawing the internal threads closer together or compressing the material being fastened.

When working with screws, nuts, and bolts, the right-hand rule generally applies; tightening moves in a clockwise direction, while loosening is done counterclockwise. This standard applies universally to most fasteners, making it essential for proper assembly and maintenance in aerospace applications.

Turning a set screw clockwise, therefore, ensures that it secures its position, preventing any unwanted movement or loosening which could compromise the integrity of the assembly.