731811 Coach screws of Iron or Steel
731812 Other wood screws of Iron or Steel
731813 Screw hooks and screw rings of Iron or Steel
731814 Self-tapping screws of Iron or Steel
731815 Other screws and bolts, whether or not with their nuts or washers of Iron or Steel
731816 Nuts of Iron or Steel
731819 Other Threaded Articles of Iron or Steel
731821 Spring washers and other lock washers of Iron or Steel
731822 Other washers of Iron or Steel
731823 Rivets of Iron or Steel
731824 Cotters and cotter pins of Iron or Steel
731829 Other Non-threaded Articles of Iron or Steel
