English to French Tech/Engineering Mechanics / Mech Engineering

Bonjour,
A quoi peut bien correspondre ce "heel pin".
"The booms are connected to heel pins at the base, which enable them to rotate and to be raised and lowered. To eliminate boom tip motion caused by barge roll during system operation, the heel pins are positioned over the longitudinal centerline of the barge."

Est-ce une goupille à talon ? Je ne parviens pas à trouver d'information à ce sujet. On me ramène toujours aux chaussures.

Merci
Emma