21 MOLDED PLASTIC ARTICLES-NAMELY, RELAY BASES, BOBBINS FOR ELECTRICAL RELAYS AND SOLENOIDS, TERMINAL HEADS FOR ELECTRICAL CONNECTORS, SWITCH LEVERS FOR AUTOMATIC ELECTRICAL SWITCHES, BRUSH HOLDER CAPS FOR ELECTRIC MOTORS, DUST PLATES FOR ELECTRICALLY DRIVEN SANDING MACHINES, TERMINAL BLOCKS FOR ELECTRICAL CONNECTIONS, SHELLS FOR ELECTRIC SOCKETS, SWITCH END FOR ELECTRIC SOCKETS, ELECTRIC PEN HANDLES, LUG STRIPS FOR ELECTRICAL CONNECTORS, SWITCH BUTTONS, PLUNGER ASSEMBLIES FOR ELECTRONIC EQUIPMENT, AND SOCKET ASSEMBLIES FOR RADIO TUBES