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U.S. imports of natural cork corks and stoppers (HS 450310) totaled $7.4M in July 2026, traded with 12 countries.
Importers of Natural Cork Corks and Stoppers paid $536K in duties in July 2026 — an effective duty rate of 9.3% on $5.8M in dutiable value, based on actual customs collections rather than the published tariff schedule. Natural Cork Corks and Stoppers imports of $7.4M in July 2026 ran 37% below the year-to-date monthly average of $11.7M.
Portugal dominates global supply of natural cork stoppers, reflecting that country's vast cork oak forests, and Italy and France are secondary sources — a geographic concentration that makes harvest cycles and Iberian weather a recurring supply-chain variable for wine and spirits importers. The US tariff schedule subdivides this heading by taper geometry and maximum diameter, with tapered stoppers exceeding 19 mm in maximum diameter split across several 10-digit lines (4503102000, 4503103000, 4503104000) and a catch-all line (4503106000) for other natural cork closures. Buyers should confirm whether their product's taper angle and diameter measurements place it in a specific dimensional subheading or the NESOI basket, as misclassification between lines is a common audit finding. Natural cork's oxygen-transmission properties and TCA-taint risk are specification factors that affect both product acceptance and supplier qualification.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
96 shipments/mo
The US schedule distinguishes tapered stoppers with a maximum diameter over 19 mm from those at or below that threshold, and further splits them by additional dimensional criteria. Importers should measure both the taper angle and the maximum diameter of each SKU and match those specifications to the applicable 10-digit line (4503102000, 4503103000, or 4503104000) before filing entry. When the product does not fit a dimensional subheading, 4503106000 (NESOI) applies.
Portugal hosts the majority of the world's cork oak (Quercus suber) forests and has a deeply established processing industry, giving it a structural cost and quality advantage. This concentration means US importers are exposed to supply disruptions from Iberian drought, bark-harvest cycles (trees are stripped roughly every nine years), and logistics bottlenecks at Portuguese ports.
HSChapter 45
Subheading 1 of 2 in heading 4503
Subheading 450310 · $7.4M of $7.5M
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ImportsExports
Imports
$7.4MYoY · Pro
Exports
$510KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 4503106000 | Corks and Stoppers of Natural Cork, NESOI | $4.8M | 6.74% | 76.67% | $320K |
| 4503104000 | Nat Cork/Stoppers NESOI Taperd Ov 19mm Max Diametr | $1.5M | 10.22% | 99.12% | $151K |
| 4503103000 | Cork/Stoppers Nat Cork Tapered Ov 19mm Max Diametr | $1.2M | 5.53% | 55.41% | $65K |
| 4503102000 | Nat Cork/Stopper Taper Ov 19mm, Diameter Nov 19 Mm | $7K | 0.00% | 0.00% | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 4503100000 | Corks and Stoppers of Natural Cork | $510K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · July 2026
origin
Portugal and Italy together supply 97% of it.
customs district
destination
entry
rate provision · imports
22.3% enters free of duty; the effective duty rate is 7.24%.