# United States tariff line 6804.21.00.30: 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) > In the United States tariff, line 6804.21.00.30 covers 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). Goods under this line enter free of general (MFN) duty. It falls under HS subheading 6804.21 in heading 68.04 (chapter 68). Source: https://border.bot/countries/united-states/hs-codes/6804210030 Last updated: 9 October 2026 [Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 68](https://border.bot/countries/united-states/hs-codes/68) / [6804.21](https://border.bot/countries/united-states/hs-codes/680421) / [6804.21.00.30](https://border.bot/countries/united-states/hs-codes/6804210030) ## Key facts - Tariff line: 6804.21.00.30 - Covers: 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) - Duty (MFN): Free - Additional duties: None recorded - Restrictions: None recorded - Tariff: [United States](https://border.bot/countries/united-states) - HS subheading: [6804.21](https://border.bot/hs-codes/680421) ## What this line covers In the United States tariff, line 6804.21.00.30 covers 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). Its legal text is “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)”, read under “Other millstones, grindstones, grinding wheels and the like” and “Of agglomerated synthetic or natural diamond”. ## How it is structured It falls under HS subheading 6804.21 in heading 68.04 (chapter 68). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff. - Chapter 68: Articles of stone, plaster, cement, asbestos, mica or similar materials - Heading 68.04: 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 - Subheading 6804.21: Other millstones, grindstones, grinding wheels and the like - Within the subheading: Of agglomerated synthetic or natural diamond - Line 6804.21.00.30: 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) ## Duty Goods under this line enter free of general (MFN) duty. The rate is published on 6804.21.00. ## In other countries No other national tariff on border.bot has live lines under 6804.21 yet. - [The Harmonized System text for 6804.21](https://border.bot/hs-codes/680421) ## Other lines under 6804.21 - [6804.21.00.10](https://border.bot/countries/united-states/hs-codes/6804210010) Segments for circular sawblades, consisting of diamond agglomerated with metal - [6804.21.00.20](https://border.bot/countries/united-states/hs-codes/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) - [6804.21.00.90](https://border.bot/countries/united-states/hs-codes/6804210090) Other - Previous line: [6804.21.00.20](https://border.bot/countries/united-states/hs-codes/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) - Next line: [6804.21.00.90](https://border.bot/countries/united-states/hs-codes/6804210090) Other ## Frequently asked questions ### What does tariff line 6804.21.00.30 cover in the United States tariff? In the United States tariff, line 6804.21.00.30 covers 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). ### What is the general (MFN) duty on 6804.21.00.30 in the United States? Goods under this line enter free of general (MFN) duty. The rate is published on 6804.21.00. ## Sources and updates The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026. The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026. The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026. This page was last updated on 9 October 2026. Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling. Official source files: - https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false Machine-readable: https://border.bot/countries/united-states/hs-codes/6804210030.json