名詞 pintle:

1. a pin or bolt forming the pivot of a hinge

pin.tle

n.（名詞）
A pin or a bolt on which another part pivots.
樞軸，柱銷，扣針：在另一鉚釘上的扣針或銷子
Nautical The pin on which a rudder turns.
【航?！?/i> 舵栓：牽引槳的部分
The pin on which a gun carriage revolves.
炮架樞軸：炮架轉(zhuǎn)動用的樞軸
A hook or a bolt on the rear of a towing vehicle for attaching a gun or trailer.
牽引掛鉤：一種掛鉤或軸，可在拖車后裝炮或拖斗

來源：
Middle English pintel
中古英語 pintel
from Old English [penis]
源自 古英語 [陰莖]