PIN BOX ASSEMBLY WITH ADJUSTABLE ENGAGEMENT DEVICE

Disclosed is a pin box assembly that includes an adjustment assembly configured to adjust a range of pivotal movement of a towed vehicle related to a towing vehicle. The pin box assembly includes a towed vehicle attachment member, an elongated arm, and a king pin with an adjustment assembly. The adjustment assembly may include a wedge and an adjustment member that is configured to translate or pivot the wedge relative to the king pin to modify a range of angular rotation between the elongated arm and the fifth wheel hitch.