Importers of HS 7604.21 (hollow profiles) from Thailand actually paid 51.5% on the taxed portion of the value in 2026-06 — 51.5% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 1.5%. Over the window the rate on the taxed portion moved 2.96% → 51.5%, with the largest single step +18.5pp in 2025-06. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 1.5% — importers actually paid 51.5%, so the trade-war overlay added 50 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "7604.21", origin: "Thailand") · see it at trimtabist.com/tariffs
HS 7604.21. The schedule base rate is 1.5%; importers from Thailand actually paid 51.5% on the dutiable value in 2026-06 — the trade-war overlay added 50 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 2.96% (2023-07) → 51.5% (2026-06), largest single step +18.5pp in 2025-06.
Thailand's lower duty (51.5% vs 62.5%) lets it price up to 7.3% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Thailand actually lands cheaper — $5.79/kg vs $8.68/kg (duty in, freight out).
15 Chapter-99 measures name Thailand; scope mapping is partial (several annexes are PDFs) — absence never means exemption. They do not sum, and some are product-specific — the collected rate above is the composed truth.
All goods from Thailand · the whole tariff ledger · 15 CBP rulings cite this code · reproduce: tariff_story(hs: "7604.21", origin: "Thailand") via /connect. Not customs or legal advice.