cotter pin

• Élément de fixation métallique utilisé pour bloquer un boulon ou un axe, généralement fendu ou plié afin d'empêcher son glissement. Largement employé en mécanique et en construction automobile.

A metal fastener used to secure a bolt or shaft, typically split or bent to prevent it from slipping out. Commonly used in mechanical and automotive contexts.

1. Fastening deviceC1formal

   A metal pin with a split end used to secure bolts or other fasteners, preventing them from loosening.

   Goupille fendue

   • The mechanic inserted a cotter pin to lock the nut in place.
   • Always use a new cotter pin when reassembling the axle.
   • The cotter pin snapped under the heavy load.