n. 枢轴, 舵栓, 牵引挂钩

[ noun ]
a pin or bolt forming the pivot of a hinge
<noun.artifact>

Pintle \Pin"tle\, n. [A diminutive of {Pin}.]
1. A little pin.

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.