HTS 6804.21.00Millstones, 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 diamond

What that translates to:Agglomerated diamond grinding wheels, saw segments and the like

Also written 68042100. Rates as CBP is collecting them today. Updated Oct 1, 2026.

Country of origin

Agglomerated diamond grinding wheels, saw segments and the… (HTS 6804.21.00) from China owe 37.5% in total duties as of Oct 1, 2026: no regular duty plus a 12.5% forced-labor tariff (Section 301) and a 25% China tariff (Section 301).

Total duty rate37.5%That's $3,750 on a $10,000 shipment.

Forced-labor tariffSection 301, since Jul 24, 202612.5%

China tariffSection 301, since May 10, 201925%

Regular dutyBase rate (MFN) in the tariff scheduleFree

Total duty37.5%

Court status: Challenged at the U.S. Court of International Trade in In re Section 301 Forced Labor Cases, Court No. 26-03555-3JP, before a three-judge panel. The plaintiffs, Learning Resources and others, have moved for judgment on the agency record, arguing that the action (91 FR 47318) exceeds USTR's statutory authority, is arbitrary and capricious, and is pretextual; 25 states, plaintiffs in Court No. 26-cv-03467-3JP, support them as amici (brief filed Sep 11, 2026). No ruling as of Oct 1, 2026, so the rate is unchanged.

Sources: USITC Harmonized Tariff Schedule, Revision 20 (2026); USTR, Notice of Actions in Section 301 Investigations (forced labor), 91 FR 47318, Jul 28, 2026; HTS 9903.05.31; USTR, Notice of Modification of Section 301 Action (List 3 raised to 25% from May 10, 2019), 84 FR 20459, May 9, 2019; HTS 9903.88.03.

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Official description

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: Other millstones, grindstones, grinding wheels and the like: Of agglomerated synthetic or natural diamond

Legal text from the Harmonized Tariff Schedule, Revision 20 (2026), chapter 68: Articles of stone, plaster, cement, asbestos, mica or similar materials.

Statistical lines

The 10-digit numbers used on entry paperwork. They share this code's duty rates.

6804.21.0010 (6804210010)Segments for circular sawblades, consisting of diamond agglomerated with metal · reported in No.
6804.21.0020 (6804210020)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) · reported in No.
6804.21.0030 (6804210030)Articles consisting of multiple segments of diamond agglomerated with metal, attached to circular plates of steel, without cutting parts (whether or not attached to non-steel plates) · reported in No.
6804.21.0090 (6804210090)Other · reported in No.

What changed for this code

Jul 24, 2026Forced-labor tariffs start on imports from 60 economies (Section 301)
Jul 22, 202625% Section 301 tariff on products of Brazil starts
Jan 1, 2026Section 301 tariff on Nicaragua starts at 0%, set to rise to 10% in 2027 and 15% in 2028

Questions about HTS 6804.21.00

What is the duty rate for HTS 6804.21.00?

The regular (column 1 general) rate printed in the tariff schedule is Free. Goods from China owe 37.5% in total as of Oct 1, 2026, including any additional tariffs. Additional tariffs depend on the country of origin; choose one above to see its full rate.

Is HTS 6804.21.00 subject to Section 301 tariffs?

Yes, for goods from 85 countries and territories as of Oct 1, 2026, including Algeria, Angola, Argentina, Australia, Austria. Choose a country above to see the rate and any exemptions.

Is HTS 6804.21.00 subject to Section 232 tariffs?

No Section 232 tariff applies to HTS 6804.21.00 as of Oct 1, 2026, from any country of origin.

HTSLookup shows the duties CBP collects on this code by country of origin. Antidumping or countervailing duties may also apply to some exporters; they're set per company and aren't shown.