window and door metallic hardware; namely, hinges, push-bar operators, limit devices and support arms

window and door hardware

WINDOW AND DOOR METALLIC HARDWARE, NAMELY, HINGES, PUSH-BAR OPERATORS COMPOSED OF STEEL, STAINLESS STEEL, OR ALUMINUM FOR USE IN OPERABLE WINDOWS, LIMIT DEVICES FOR USE IN LIMITING THE OPENING OF OPERABLE WINDOWS, AND SUPPORT ARMS FOR USE IN OPERABLE WINDOWS