6804.21.00.90 - Other

This HTS category, 6804.21.00.90, encompasses "Other" articles of the type described under heading 6804, specifically millstones, grindstones, grinding wheels, and similar articles, as well as hand sharpening or polishing stones and their parts. These items are characterized by their composition of agglomerated synthetic or natural diamond. This broad "Other" designation applies to such diamond-bonded articles that do not fit the more specific descriptions found in preceding subheadings.

To differentiate this category from its siblings, consider the specific forms of diamond-agglomerated articles already detailed. Subheadings 6804.21.00.10, 6804.21.00.20, and 6804.21.00.30 specifically address segments for circular sawblades, continuous rim segments attached to circular plates, and multiple segments attached to circular plates, respectively, where the diamond is agglomerated with metal. This category, 6804.21.00.90, therefore captures other configurations or types of diamond-agglomerated grinding, cutting, or polishing tools that do not fall under these precise descriptions, such as grinding wheels with complex shapes or hand-held polishing blocks made from diamond agglomerates.

As this node is a leaf node within the HTS structure, there are no further subdivisions. Classification into this category is determined by confirming that the article is indeed a millstone, grindstone, grinding wheel, sharpening stone, or a part thereof, and that it is made from agglomerated synthetic or natural diamond, while also ensuring it does not meet the criteria for any of the more specific sibling categories that enumerate particular forms or assemblies of diamond-agglomerated articles. The key differentiating factor for items classified here is their composite nature of diamond bound by an agglomerating material, used for abrasive purposes, and their exclusion from the more narrowly defined sibling entries.