The AMF Male Ball Pin with mounting sleeve is a heavy-duty coupling designed to securely connect a pup trailer to the Female Ball Coupling mounted on a semi-trailer. The Male Ball Pin and weld-in mounting sleeve is locally designed and manufactured by AMF and is the market leading tanker pup trailer ball pin. The Male Ball Pin is secured in place with the weld-in sleeve located on the gooseneck of the pup trailer, and locked into place with the male ball pin nut and split pin. The AMF Male Ball Pin is made of a durable robust and sturdy construction and is known for its safety and reliability when hauling a pup tanker behind a semi-trailer. The rotating of the ball on the Male Ball Pin creates an even wear, prolonging lifespan and down time.