Subheading 731811: Iron or Steel; Threaded Coach Screws
Subheading 731812: Iron or Steel; Threaded Wood Screws other than Coach Screws
Subheading 731813: Iron or Steel; Threaded Screw Hooks and Screw Rings
Subheading 731814: Iron or Steel; Threaded Self-tapping Screws
Subheading 731815: Iron or Steel; Threaded Screws and Bolts N.E.C. in Item No. 7318.1 … etc.
Subheading 731816: Iron or Steel; Threaded Nuts
Subheading 731819: Iron or Steel; Threaded Screws, Bolts and Nuts N.E.C. in Item No. … etc.
Subheading 731821: Iron or Steel; Non-threaded Spring Washers and other Lock Washers
Subheading 731822: Iron or Steel; Non-threaded Washers, Excluding Spring and Lock
Subheading 731823: Iron or Steel; Non-threaded Rivets
Subheading 731824: Iron or Steel; Non-threaded Cotters and Cotter-pins
Subheading 731829: Iron or Steel; Non-threaded Articles, N.E.C. in Item No. 7318.2