noun
- a wrench with a pin or pins that fit into holes or slots on a nut or bolt head, used to tighten or loosen fasteners
Usage: also called a pin spanner or pin wrench; commonly used in mechanical and automotive work
Examples
- The mechanic used a pinwrench to remove the large nut from the wheel hub.
- A pinwrench is essential when working with specialized fasteners that have pin holes.
- She selected the correct pinwrench size to avoid stripping the bolt.
- The pinwrench's pins engaged perfectly with the holes in the coupling nut.