lockpin

plural lockpins

1. aeronauticsA pin used to lock a mechanism and prevent it from moving.

   The lockpin housing contains a bushing for the parking lockpin mechanism and a bonded nylon strap.

   1989, US Department of the Army, Aviation Unit and Intermediate Maintenance Manual, page 3-54

   2 more examples

   The pulling force exerted by the arms will then cause the spring-loaded lockpin retract collar to contact two fiberglass catches in the receptacle.

   1970, US Bureau of Naval Personnel, Aviation Structural Mechanic E 1 & C., page 270

   These safety lockpins, when engaged, prevent the main locking pins from disengaging, regardless of hydraulic pressure.

   2008, US Navy, Grumman F6F Hellcat Pilot's Flight Operating Instructions, →ISBN, page 16