Abstract: An attachment clamp for a utility vehicle cargo box with a cylindrical bar along a top surface of the sidewall. The attachment clamp includes an inner plate positioned inside the sidewall, and an outer plate hinged to the inner plate and positioned outside the sidewall. Each of the inner plate and outer plate including a bar gripping element to grip the bar along a top surface of the sidewall. A handle is connected to the plates and pivotable to move the inner and outer plates together to a clamped position around the bar or apart to an unclamped position. The handle may include a lobe that cams the plates together and enters a recess in the outer plate in the clamped position, and a spring urging the inner and outer plates apart toward the unclamped position.

Abstract: Interlocking load dividers for a utility vehicle cargo box include a primary load divider with a plurality of notches in its top edge, and one or more secondary load dividers slidably interlocked to the primary load divider. Each secondary load divider has a downwardly facing L-hook interlocking with one of the notches such that the secondary load divider is perpendicular to the primary load divider.

Abstract: An attachment mounting device for a utility vehicle cargo box with a sidewall with a bar along a top edge and a recessed surface in the sidewall below the bar. The attachment mounting device has a head at an upper end, a hook at a lower end, and a mid-section therebetween. A handle is attached to a cam insert having a cam surface contacting the bar. The cam insert is slidable to move the cam insert around the bar to move the hook upward sufficiently to engage the recessed surface in the sidewall.

Abstract: An attachment clamp for a utility vehicle cargo box with a cylindrical bar along a top surface of the sidewall. The attachment clamp includes an inner plate positioned inside the sidewall, and an outer plate hinged to the inner plate and positioned outside the sidewall. Each of the inner plate and outer plate including a bar gripping element to grip the bar along a top surface of the sidewall. A handle is connected to the plates and pivotable to move the inner and outer plates together to a clamped position around the bar or apart to an unclamped position. The handle may include a lobe that cams the plates together and enters a recess in the outer plate in the clamped position, and a spring urging the inner and outer plates apart toward the unclamped position.

Abstract: Interlocking load dividers for a utility vehicle cargo box include a primary load divider with a plurality of notches in its top edge, and one or more secondary load dividers slidably interlocked to the primary load divider. Each secondary load divider has a downwardly facing L-hook interlocking with one of the notches such that the secondary load divider is perpendicular to the primary load divider.

Abstract: An attachment mounting device for a utility vehicle cargo box with a sidewall with a bar along a top edge and a recessed surface in the sidewall below the bar. The attachment mounting device has a head at an upper end, a hook at a lower end, and a mid-section therebetween. A handle is attached to a cam insert having a cam surface contacting the bar. The cam insert is slidable to move the cam insert around the bar to move the hook upward sufficiently to engage the recessed surface in the sidewall.