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Glossary Term

Kingpin

Kingpin Definition:

A kingpin is a coupling mechanism with a large metal pin connecting a semi-truck with a trailer. It is attached to the fifth wheel hitch during the hauling process to ensure secure attachment.

The kingpin's primary work is to connect a semi-truck with a trailer when hauling. It also helps steer and handle the coupled rigs and keep the semi-truck and the trailer together. It helps securely attach a container to the chassis, providing stability and safe handling.

Crane lifting a Container on a trailer.

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