7310.21Subheading
Cans; which are to be closed by soldering or crimping, for any material (excluding compressed or liquefied gas), less than 50l capacity, of iron or steel
Section XV — Base metals and articles of base metal
This is a 6-digit subheading — the most specific level of the international HS. Country tariff schedules extend it further; the US tariff lines (HTS) below refine it to 8–10 digits for duty purposes.
US tariff lines for this subheading are not in the bundled starter dataset yet — the full HTS schedule is coming soon. You can still search by code in the tariff simulator.