7318: Screws, bolts, nuts, coach-screws, screw hooks, rivets, washers & sim

731811: Screws, coach, iron or steel 731812: Screws, wood, iron or steel, nes 731813: Screw hooks and screw rings of iron or steel 731814: Screws, self-tapping, iron or steel 731815: Bolts o screws nes, with o without their nuts o washers, iron o steel 731816: Nuts, iron or steel, nes 731819: Threaded articles of iron or steel, nes 731821: Washers, spring or lock, iron or steel 731822: Washers, iron or steel, nes 731823: Rivets, iron or steel 731824: Cotters and cotter-pins, iron or steel 731829: Non-threaded articles of iron or steel, nes 7318: Screws, bolts, nuts, coach-screws, screw hooks, rivets, washers & sim