An assembly includes a base component secured to vehicle frame components and a first body component having an inside surface abutting the base component. The assembly further includes a first fastening member securing the first body component to the base component. The first fastening member has a first flange portion engaging the outside surface of the first body component and a first shaft portion engaging the base component. The assembly also includes a second body component abutting the first flange portion of the first fastening member opposite the first body component and a second fastening member securing the second body component to the first body and base components. The second fastening member has a second flange portion engaging the second body component and a second shaft portion engaging the first shaft portion of the first fastening member.