| 731811 | 731811 - Iron or steel; threaded coach screws |
| 731812 | 731812 - Iron or steel; threaded wood screws other than coach screws |
| 731813 | 731813 - Iron or steel; threaded screw hooks and screw rings |
| 731814 | 731814 - Iron or steel; threaded self-tapping screws |
| 731815 | 731815 - Iron or steel; threaded screws and bolts n.e.c. in item no. 7 |
| 731816 | 731816 - Iron or steel; threaded nuts |
| 731819 | 731819 - Iron or steel; threaded screws, bolts and nuts n.e.c. in item |
| 731821 | 731821 - Iron or steel; non-threaded spring washers and other lock was |
| 731822 | 731822 - Iron or steel; non-threaded washers, excluding spring and loc |
| 731823 | 731823 - Iron or steel; non-threaded rivets |
| 731824 | 731824 - Iron or steel; non-threaded cotters and cotter-pins |
| 731829 | 731829 - Iron or steel; non-threaded articles, n.e.c. in item no. 7318 |