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    6804.21.00

    Of agglomerated synthetic or natural diamond

    This code covers millstones, grinding wheels, and similar abrasive tools made of agglomerated synthetic or natural diamond. Use this code when importing these tools—duty is generally free, but check for specific trade program eligibility as outlined in Chapter 68.

    Of agglomerated synthetic or natural diamond

    Detailed information for HTS Code 6804.21.00

    This tariff classification falls within Chapter 68, which covers articles of stone, plaster, cement, asbestos, mica, or similar materials, and specifically addresses millstones, grindstones, and grinding wheels without frameworks. Code 6804.21.00 covers these items made of agglomerated synthetic or natural diamond. This code has several subdivisions to further specify the type of diamond product, including segments for circular sawblades (6804.21.00.10), articles with continuous rim segments (6804.21.00.20), those with multiple segments (6804.21.00.30), and an ‘other’ category (6804.21.00.90) to cover any diamond grinding or polishing articles not specifically listed. When reporting, select the statistical suffix that most accurately describes the specific diamond product being imported, or use ".90" for anything not explicitly detailed.

    ChapterChapter 68 - Articles of stone, plaster, cement, asbestos, mica or similar materials
    SectionSection XIII - Articles of Stone, Plaster, Cement, Asbestos, Mica or Similar Materials; Ceramic Products; Glass and

    Duty snapshot

    Quick reference for the duty outcomes tied to this HTS line.

    General Duty

    Free

    Standard trade partners (NTR)

    Special Duty

    N/A

    Eligible FTA or preference programs

    The general duty rate for HTS code 6804.21.00 and all its subdivisions (6804.21.00.10, 6804.21.00.20, 6804.21.00.30, and 6804.21.00.90) is Free, indicating no duty is assessed on these goods. This applies to standard trade partners (NTR). Special rates are not specified, meaning there are no preferential duty rates based on eligibility for FTA or preference programs. There are no report units specified for this code.

    Rate of Duty (Column 2): 30%

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    Code subdivisions

    6804.21.00.10

    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 > Segments for circular sawblades, consisting of diamond agglomerated with metal

    6804.21.00.20

    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 > 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)

    6804.21.00.30

    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 > 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)

    6804.21.00.90

    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 > Other

    View HTS reference

    Chapter & section notes

    Chapter notes

    Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes CHAPTER 68 ARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIALS XIII 68-1 Notes 1. This chapter does not cover: (a) Goods of chapter 25; (b) Coated, impregnated or covered paper and paperboard of heading 4810 or 4811 (for example, paper and paperboard coated with mica powder or graphite, bituminized or asphalted paper and paperboard); (c) Coated, impregnated or covered textile fabric of chapter 56 or 59 (for example, fabric coated or covered with mica powder, bituminized or asphalted fabric); (d) Articles of chapter 71; (e) Tools or parts of tools, of chapter 82; (f) Lithographic stones of heading 8442; (g) Electrical insulators (heading 8546) or fittings of insulating material of heading 8547; (h) Dental burrs (heading 9018); (ij) Articles of chapter 91 (for example, clocks and clock cases); (k) Articles of chapter 94 (for example, furniture, luminaires and lighting fittings, prefabricated buildings); (l) Articles of chapter 95 (for example, toys, games and sports equipment); (m) Articles of heading 9602, if made of materials specified in note 2(b) to chapter 96, or of heading 9606 (for example, buttons), of heading 9609 (for example, slate pencils), heading 9610 (for example, drawing slates) or of heading 9620 (monopods, bipods, tripods and similar articles); or (n) Articles of chapter 97 (for example, works of art). 2. In heading 6802 the expression "worked monumental or building stone" applies not only to the varieties of stone referred to in heading 2515 or 2516, but also to all other natural stone (for example, quartzite, flint, dolomite and steatite) similarly worked; it does not, however, apply to slate. Additional U.S. Notes 1. For the purposes of heading 6802, the term " slabs" embraces flat stone pieces, not over 5.1 cm in thickness, having a facial area of 25.8 cm2 or more, the edges of which have not been beveled, rounded or otherwise processed except such processing as may be needed to facilitate installation as tiling or veneering in building construction. 2. For the purposed of heading 6810, the term " tiles" does not include any article 3.2 cm or more in thickness. Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes XIII 68-2

    Section notes

    SECTION XIII ARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIALS; CERAMIC PRODUCTS; GLASS AND GLASSWARE XIII-1 Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes XIII-2 Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes

    Latest update

    Last updated

    November 15, 2025

    Revised every January & July

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