HTS 7307 — Steel tube or pipe fittings Tariff Rate (2026)

Under HTS 7307, steel tube or pipe fittings enter the United States with a 5% MFN duty rate as the base MFN rate. Tube or pipe fittings of iron or steel including elbows, bends, flanges, and couplings. Beyond the base MFN duty, goods under this heading from most non-EU origins add the Section 301 forced-labor tariff (10% standard, 12.5% for the ~28-economy forced-labor tier such as China, Vietnam, and Thailand), which took over from the expired Section 122 rate on July 24, 2026. EU-origin goods are capped at the 15% all-inclusive EU-US deal ceiling instead. Because this is a Section 232 metals heading, articles wholly of the metal pay 25% on full customs value (derivatives 25%), and the base forced-labor surcharge does NOT stack on the metal content — so a wholly-metal article's rate is the Section 232 figure alone, not that figure plus 10%. Chinese-origin goods add a Section 301 China tariff of 25% on top. Worked example: a $10,000 shipment under HTS 7307 subject to the 25% Section 232 metals tariff owes about $2,500 in Section 232 duty on the metal content, with the base forced-labor surcharge excluded on that content. Use the tariff calculator for your exact classification and origin. The top countries of origin for HTS 7307 imports include CN, IN, KR, IT, MX. Effective duty varies by source country based on trade agreements (USMCA, KORUS) and tariff programs — see the per-country tariff rates by country for how CN compares.