Section 15 Base metals and articles of base metal 73 Articles of iron or steel 73 18 Screws, bolts, nuts, coach-screws, screw books... of iron or steel 73 18 15 Screws and bolts of iron or steel, nes Commodity Code Description 73 18 15 00 Screws and bolts of iron or steel, nes 73 18 15 10 Having a shank of an external diameter not exceeding 16 mm 73 18 15 90 Other
