Definition of split pin in English:

split pin


  • A metal cotter pin with two arms passed through a hole, held in place by the springing apart of the arms.

    • ‘It was only sealed with a split pin so she opened the envelope and pulled out the documents.’
    • ‘The split pin was wrenched out by nitrogen-crazed river weed and there you are.’
    • ‘Two of the design features of the Mills bomb are still to be found in many modern hand grenades - the split pin and the handle which secures the spring-loaded firing pin.’