U.S. imports of Base Metal Fittings for Looseleaf Binders or Files (HS 830510) totaled $600K in August 2026, imported from 8 countries.
Importers of Base Metal Fittings for Looseleaf Binders or Files paid $122K in duties in August 2026, an average duty rate of 20.32% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Base Metal Fittings for Looseleaf Binders or Files imports of $600K in August 2026 ran 34% above the year-to-date monthly average of $449K.
Last updated: August 2026 dataRing binder mechanisms and other looseleaf fittings of base metal are a core input for the stationery and office-products manufacturing sector, and the US tariff schedule distinguishes ring binder mechanisms (8305100010) from other looseleaf fittings (8305100050), a split that matters for duty and Section 301 exposure on Chinese-origin goods. China is the dominant supplier, with South Korea and Hungary as notable secondary sources. Importers should verify whether finished binder assemblies versus bare mechanisms are being imported, as the classification boundary can affect both duty rate and admissibility.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
40 import shipments a month
HTS 8305100010 covers ring binder mechanisms specifically — the metal spine-and-ring assemblies that open and close to hold looseleaf pages. HTS 8305100050 covers other fittings for looseleaf binders and files not elsewhere specified, such as prong fasteners or spine clips. Correct classification depends on the mechanism's design and function.
The United States does not have a free trade agreement with the European Union, so Hungarian-origin binder fittings do not benefit from preferential duty rates. Normal trade relations (NTR/MFN) rates apply, and importers should confirm the applicable column 1 rate with a customs broker.
Subheading 3 of 3 in heading 8305
Subheading 830510 · $600K of $11.1M
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8305100010 | Ring Binder Mechanisms for Loosleaf Bndrs, Bs Metl | $343K | 22.02% | 100.00% | $76K |
| 8305100050 | Fittings for Looseleaf Binders, Files NESOI Bs Mtl | $257K | 18.04% | 100.00% | $46K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8305100000 | Base Metal Fittings for Looseleaf Binders or Files | $256K |
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.
ImportsExports
Imports
$600KYoY · free account
Exports
$256KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $5.1M of Base Metal Fittings for Looseleaf Binders or Files and exported $1.2M.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
China and South Korea together supply 99% of it. China pays 23.6% duty; Italy 10.0%.
customs district
destination
entry
rate provision · imports
duty collected equals 20.32% of imports for consumption.