Parts and accessories for vehicles including hitch steps, hitch platforms, and devices for use with hitches; parts and accessories for hitches; structural parts for hitches; hitch plugs for vehicles including automobiles, utility vehicles and trucks; hitch mountable devices; hitch-mountable platforms and parts therefor; hitch devices; hitch mounts; hitch covers; hitch mountable platforms of metal; hitch balls; hitch ball covers; hitch boxes; hitch receivers; hitch kits including parts and accessories