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HTS Code · Chapter 68 · Updated Nov 3, 2026

6804.21.00.20Millstones, grindstones, grinding wheels and the like

Also written 6804210020 and 6804.21.0020

HTS Code 6804.21.00.20 covers any article best defined as Articles of Stone, Plaster, Cement, Asbestos, Mica or Similar Materials; Ceramic Products; Glass and GlasswareArticles of stone, plaster, cement, asbestos, mica or similar materialsMillstones, 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:Other millstones, grindstones, grinding wheels and the like:Of agglomerated synthetic or natural diamondArticles consisting of a continuous rim segment of diamond agglomerated with metal, attached to circular plates of steel (whether or not attached to non-steel plates) in the Harmonized Tariff Schedule.

As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from China pay 37.5% in duties: a duty-free base rate plus Section 301 – China (25%) and Section 301 – Forced Labor (12.5%).

From China, the total duty on 6804.21.00.20 last changed on Jul 24, 2026, from 35% to 37.5%. It has changed 2 times since Nov 17, 2025.

Estimated Duty on 6804.21.00.20

$10,000.00 by ocean, entered Nov 3, 2026

China
Total duty
37.5%
$3,750.00 on this shipment
Fees
0.47%
MPF + HMF · $47.14
Duty + fees
37.97%
Payable to CBP
Landed cost
$13,797.14
On $10,000.00 customs value
  • Section 301 – China25%
  • Section 301 – Forced Labor12.5%
  • Customs fees0.47%

Chapter 99 lines9903.88.03Section 301 China: List 39903.05.31Section 301 Forced Labor – China

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Base Duty Rates for 6804.21.00.20

Set at 6804.21.00 in the Harmonized Tariff Schedule

General Rate of Duty
Free
Special Rate of Duty
—
Column 2 (Non-NTR)
30%
Units of Quantity
No.
Total duty by countryAll 20 →
  • China37.5%
  • Mexico10%
  • Canada10%
  • Vietnam12.5%
  • Germany10%

Tariff updates

Recent US tariff actions that name 6804.21.00.20 or its heading.

All tariff updates

AD/CVD Cases

Antidumping or countervailing duty orders and investigations whose scope lists 6804.21.00.20 or a related code. They apply only to goods from the countries named, and only if the product fits the scope's description.

Tariffs by country · Nov 3, 2026

US Import Duty on HTS 6804.21.00.20 by Country of Origin

As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from China pay 37.5% in duties: a duty-free base rate plus Section 301 – China (25%) and Section 301 – Forced Labor (12.5%). Of the 20 largest sources of US imports, the lowest total is 10%, from Mexico, Canada and 11 more.

Total duty from China
37.5%
Base rate plus 2 additional tariffs
Lowest total duty
10%
From Mexico, Canada and 11 more
Countries with additional tariffs
20 of 20
Section 232, 301 and other Chapter 99 duties
Country of originBase rateAdditional tariffsTotal duty
ChinaFree37.5%
MexicoFree10%0% with USMCA
CanadaFree10%0% with USMCA
VietnamFree12.5%
GermanyFree10%
JapanFree12.5%
South KoreaFree12.5%
TaiwanFree10%
IndiaFree10%
IrelandFree10%
ItalyFree10%
SwitzerlandFree12.5%
ThailandFree12.5%
MalaysiaFree10%
United KingdomFree10%
FranceFree10%
IndonesiaFree10%
BrazilFree37.5%
BangladeshFree10%
CambodiaFree10%
Duty from each country, in words
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from China pay 37.5% in duties: a duty-free base rate plus Section 301 – China (25%) and Section 301 – Forced Labor (12.5%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Mexico pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%). With USMCA, qualifying goods pay 0%.
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Canada pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%). With USMCA, qualifying goods pay 0%.
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Vietnam pay 12.5% in duties: a duty-free base rate plus Section 301 – Forced Labor (12.5%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Germany pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Japan pay 12.5% in duties: a duty-free base rate plus Section 301 – Forced Labor (12.5%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from South Korea pay 12.5% in duties: a duty-free base rate plus Section 301 – Forced Labor (12.5%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Taiwan pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from India pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Ireland pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Italy pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Switzerland pay 12.5% in duties: a duty-free base rate plus Section 301 – Forced Labor (12.5%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Thailand pay 12.5% in duties: a duty-free base rate plus Section 301 – Forced Labor (12.5%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Malaysia pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from United Kingdom pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from France pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Indonesia pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Brazil pay 37.5% in duties: a duty-free base rate plus Section 301 – Brazil (25%) and Section 301 – Forced Labor (12.5%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Bangladesh pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Cambodia pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).

Duties on goods entered Nov 3, 2026 at the general rate (Column 2 where it applies), with tariff data verified through 2026 HTS Revision 20. Totals are before customs fees (MPF, HMF) and any antidumping or countervailing duties (AD/CVD); with a free account, the calculator checks the AD/CVD cases that may cover your import. Some tariffs and exemptions depend on details such as metal content or end use, which the calculator asks about. See US tariffs for every country.

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Example alert

New tariff action affects 1 of your imports

6804.21.00.20from China37.5% → 47.5%

Its rate today, if a new 10% tariff were added

Top origins · US imports 2025

Top Origins: Countries the US Imports HTS 6804.21.00.20 From

In 2025 the US imported $14M of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20), down 2% on 2024, mostly from Thailand (23%), South Korea (22%) and Indonesia (14%). Each country's total duty today is shown beside its imports.

Country of originUS imports, 2025Sharevs 2024Total duty today
Thailand$3M23%33%12.5%
South Korea$3M22%39%12.5%
Indonesia$2M14%21%10%
Vietnam$1M10%3138%12.5%
Italy$1M8%41%10%
Japan$1M8%4%12.5%
Spain$496K4%171%10%
China$479K3%18%37.5%
Germany$343K2%17%10%
Taiwan$319K2%2558%10%

Source: U.S. Census Bureau, general imports. Duty on a $10,000 ocean shipment entered today, before customs fees. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Related codes

Other HTS Codes at This Level

Legal notes

Relevant HTS Notes

Official USITC notes that may affect classification under HTS 6804.21.00.20.

CBP rulings

Related CROSS Rulings for HTS 6804.21.00.20

CBP classification rulings related to 6804.21.00.20. Open a ruling to read how Customs classified a similar product.

hq 952587Jan 26, 1993

Crushed Diamond and Cobalt Segments, Saw Blade Cutting Parts, Crescent Shapes, Square Shapes; Amborite; Sawing Wire Beads; Natural or Artificial Abrasive Powder or Grain, Heading 6805; Abrasive Materials on a Backing; PRDs 1604-92-100001 and 1604-92-100002

6804.21.007116.20.50
hq H085978Nov 19, 2010

Application for Further Review of Protest No. 3195-09-100342; Classification of a diamond dresser conditioning disk

6804.21.00
hq H284143Dec 28, 2017

Request for classification of diamond circular saw blades

6804.21.00
hq H277235Nov 30, 2018

Revocation of NY 876359; Tariff classification of diamond wire from Italy

6804.21.0080
hq H052562Dec 10, 2010

Application for Further Review of Protest No. 3195-09-100019; Classification of a CMP pad conditioner

6804.21.00
Questions

HTS 6804.21.00.20 FAQ

Something else? Ask us.

What does HTS code 6804.21.00.20 cover?

HTS code 6804.21.00.20 covers millstones, grindstones, grinding wheels and the like (Articles consisting of a continuous rim segment of diamond agglomerated with metal, attached to circular plates of steel (whether or not attached to non-steel plates)), classified under Chapter 68 (Articles of stone, plaster, cement, asbestos, mica or similar materials) in the US Harmonized Tariff Schedule. The general duty rate is Free.

What is the duty rate for HTS 6804.21.00.20?

The general (Column 1) rate of duty for HTS 6804.21.00.20 is Free. The Column 2 rate, for countries without normal trade relations, is 30%. Additional Chapter 99 tariffs, such as Section 301 and Section 232, can apply on top depending on the country of origin.

What is the US tariff on millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from China?

As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from China pay 37.5% in duties: a duty-free base rate plus Section 301 – China (25%) and Section 301 – Forced Labor (12.5%).

What is the US tariff on millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Vietnam?

As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Vietnam pay 12.5% in duties: a duty-free base rate plus Section 301 – Forced Labor (12.5%).

What is the US tariff on millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Mexico?

As of Nov 3, 2026, US imports of millstones, grindstones, grinding wheels and the like (HTS 6804.21.00.20) from Mexico pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%). Goods that qualify for USMCA pay 0%.

Where does the US import HTS 6804.21.00.20 from?

In 2025 the US imported $14M of millstones, grindstones, grinding wheels and the like under HTS 6804.21.00.20, mostly from Thailand (23%), South Korea (22%) and Indonesia (14%), according to U.S. Census Bureau import data.

Which country has the lowest US duty on HTS 6804.21.00.20?

Of the 20 largest sources of US imports, the lowest total duty on HTS 6804.21.00.20 is 10%, from Mexico, Canada and 11 more, as of the tariffs in effect on 2026-11-03.

Do antidumping or countervailing duties apply to HTS 6804.21.00.20?

They may. Antidumping or countervailing duty (AD/CVD) cases whose scope lists HTS 6804.21.00.20 or a related code cover diamond sawblades and parts thereof from China. A case applies only to goods from the countries it names that fit the scope's written description, and its duty is on top of the regular duty. With a free HTS Hero account, the duty calculator checks the cases and new petitions that may cover your import and shows the deposit rates Commerce set and the companies named.

Sources

Primary Sources

The official documents behind the rates and tariffs on this page. Duties are worked out from them as of Revision 20 (2026); check the legal text before you file.