Product classification
HS code for Grindstones: 6804.10
Millstones and grindstones, for milling, grinding or pulping.
Classification of grindstones under HS 6804.10
Grindstones used for milling, grinding, or pulping are classified under HS code 6804.10. This heading is part of Chapter 68, which encompasses articles of stone, plaster, cement, asbestos, mica, or similar materials. Heading 6804 specifically covers millstones, grindstones, grinding wheels, and the like, without frameworks, for working stone, ceramics, or other materials. Subheading 6804.10 is reserved for those stones specifically intended for milling, grinding, or pulping processes. These items are typically made of natural stone, agglomerated natural or artificial abrasives, or ceramics. The absence of a framework or mechanical drive system at the time of classification is what separates this code from tool-based headings in Chapter 82 or machinery in Chapter 84. The classification is based on the material composition and the intended industrial application. These stones are often used in the food industry for grinding grain or in the paper industry for pulping wood. The Harmonized System requires that these articles be presented without any mounting; once they are mounted on a spindle or in a frame, their classification may change to Chapter 82 or 84 depending on the complexity of the assembly.
- Covers
- Natural stone millstones for flour milling
- Agglomerated abrasive grindstones for pulping
- Ceramic grinding wheels for industrial milling
- Replacement grindstones for pulping machines
- Horizontal or vertical millstones without frames
- Also under 6804.10
- Traditional European flour millstones
- industrial mineral grinding wheels
- specialized pulpwood grinders
- heritage grain processing stones
Codes often confused with 6804.10
Common mistake. Grindstones are often misclassified under HS code 8205.90 if the importer assumes they are hand tools. However, 8205.90 requires a framework. Another common mistake is HS code 6805, which covers abrasive powder or grain on a base of textile material or paper (sandpaper). Grindstones are solid articles, not coated abrasives. Additionally, if the stone is for sharpening knives by hand (whetstones), it may fall under 6804.30 rather than 6804.10.
Top exporters and importers of HS 680410 (the code used for grindstones), 2025
In 2025, the largest exporter of HS 680410 (the code used for grindstones) in UN Comtrade data was the Philippines, with 20% of world exports; the largest importer in UN Comtrade data was Indonesia, with 14% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 680410, not only grindstones.
Top exporters 2025 · share of world exports
- 1 Philippines $21M 20% of world exports
- 2 Israel $15M 14% of world exports
- 3 United States $14M 13% of world exports
World total: $108M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Indonesia $17M 14% of world imports
- 2 South Korea $13M 11% of world imports
- 3 Malaysia $10M 8.7% of world imports
World total: $116M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for grindstones
Brazil classifies grindstones under NCM 6804.10.00: HS 6804.10 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about grindstones
What is the HS code for Grindstones?
The HS code for Grindstones is 680410 (Millstones and grindstones; for milling, grinding or pulping). Grindstones for milling, grinding, or pulping are classified under HS code 6804.10.
How do I classify Grindstones for customs?
Grindstones is classified under HS code 680410 — Millstones and grindstones; for milling, grinding or pulping. This is a 6-digit subheading level code.
Can these grindstones contain diamond abrasives?
Yes, grindstones made of agglomerated synthetic diamonds are still classified under heading 6804, provided they are not mounted on a framework.
Which countries are the top exporters of grindstones (HS 680410)?
In 2025, the top exporters of HS 680410 (the code used for grindstones) in UN Comtrade data were the Philippines ($21M, 20% of world exports), Israel ($15M) and the United States ($14M). World exports came to about $108M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of grindstones (HS 680410)?
In 2025, the top importers of HS 680410 (the code used for grindstones) in UN Comtrade data were Indonesia ($17M, 14% of world imports), South Korea ($13M) and Malaysia ($10M). World imports came to about $116M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Grindstones the same in all countries?
The base HS code 680410 for Grindstones is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for grindstones in Brazil?
In Brazil, grindstones (HS 680410) is classified under NCM 6804.10.00.