reverse thread

**reverse thread**
A reverse thread is a type of screw thread that is designed to tighten in the opposite direction of standard threads. Unlike conventional right-hand threads that tighten clockwise, reverse threads tighten counterclockwise. They are commonly used in applications where rotation or vibration might cause a standard thread to loosen, such as in bicycle pedals, certain plumbing fittings, and machinery parts. Using reverse threads helps ensure secure fastening and prevents accidental loosening during operation.