Millstones — HTS 6804
Millstones, grindstones, grinding wheels and the like, without frameworks, for grinding, sharpening, polishing, trueing or cutting, hand sharpening or polishing stones, and parts thereof, of natural stone, of agglomerated natural or artificial abrasives, or of ceramics, with or without parts of other materials
Chapter 68 › Heading 6804
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS heading 6804 is a broad product category for certain abrasive and grinding articles. It generally covers millstones, grindstones, grinding wheels, sharpening, polishing, trueing, and cutting stones or wheels that are supplied without a supporting framework. It also includes hand-operated sharpening or polishing stones and parts of these articles, when made of natural stone, agglomerated natural or artificial abrasives, or ceramics. Products may include parts made from other materials where the tariff provisions allow it.
To reach the correct 8-digit HTSUS code, first confirm that the product belongs in heading 6804 rather than a heading for a complete machine, mounted tool, or another type of abrasive article. Then identify the product’s form and principal function—such as a wheel, stone, millstone, or part—and its material or abrasive composition. The lower-level subheadings commonly distinguish products by these characteristics, but the exact 8-digit wording, legal notes, and statistical descriptions must be checked in the current HTSUS.
What to check
- Describe the article’s function and physical form, including whether it is a wheel, stone, millstone, hand stone, or replacement part.
- Verify the main material: natural stone, agglomerated natural abrasive, agglomerated artificial abrasive, ceramic, or a combination with other materials.
- Confirm whether the item is supplied without a framework or mounting structure; a mounted or machine-specific article may require a different classification analysis.
- Review the complete 8-digit subheading text, section and chapter notes, and any relevant classification rulings before selecting a code.
- Keep product specifications, composition details, photographs, and supplier information available so a customs broker or classification specialist can verify the choice.
HTS heading 6804 summary
Millstones is a 4-digit product category containing 2 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Product codes & duty rates
👇 Each row is a specific product code — click a blue code to open its full page with exact duty rates by country, the rate-history chart, and a duty calculator. 👉
| Code | Description | General (MFN) | Special | Column 2 |
|---|---|---|---|---|
| 6804.10.00.00 👉 | Millstones and grindstones for milling, grinding or pulping | Free | — | Free |
| 6804.30.00.00 👉 | Hand sharpening or polishing stones | Free | — | Free |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 6804?
Millstones, grindstones, grinding wheels and the like, without frameworks, for grinding, sharpening, polishing, trueing or cutting, hand sharpening or polishing stones, and parts thereof, of natural stone, of agglomerated natural or artificial abrasives, or of ceramics, with or without parts of other materials. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.