pintle

n. [ A diminutive of Pin. ] 1. A little pin. [ 1913 Webster ]

2. (Mech.) An upright pivot pin; as: (a) The pivot pin of a hinge. (b) A hook or pin on which a rudder hangs and turns. (c) A pivot about which the chassis swings, in some kinds of gun carriages. (d) A kingbolt of a wagon. [ 1913 Webster ]