Kingpin or king pin may refer to:

Vehicular part edit

  • Kingpin (automotive part), the pivot in the steering mechanism
    • The central bolt of a skateboard, axle assembly ("truck"), around which the rest of the mechanism can flex, allowing the rider to steer by shifting body weight
    • The pivot or connector between a tractor and trailer in the fifth-wheel coupling of semi-trailer truck
  • The pivot in a railway car bogie

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