A removable vehicle bed tie down device comprises a clamp body and a gripper assembly that is securely advanceable relative to the clamp body. The clamp body and the gripper assembly are shaped and configured to apply a gripping force to two intersecting walls of a bed rail of a vehicle such as a pick up truck. The clamp body includes a mount point and a rib that may be formed as an integrated unitary structure with the clamp body, thus providing high strength and stiffness with low manufacturing costs. The rib extends over substantially the entire outer surface of the clamp body and distributes loads applied to the mount point over the entire clamp body and to the gripper assembly.