Product classification
HS code for Thresher screens: 8433.90
Harvesting machinery, parts, including parts of threshing machinery, straw or fodder balers and grass or hay mowers.
Classification of thresher screens under HS 8433.90
Thresher screens are classified under HS code 8433.90, which specifically covers parts of harvesting or threshing machinery. The classification logic follows General Interpretative Rule (GRI) 1 and 6, as well as Section XVI Note 2(b). Because these screens are identifiable as being solely or principally used with agricultural threshing machines, they are categorized as parts rather than general-purpose metal components. These screens play a critical role in the separation of grain from chaff and straw, and their design is specific to the mechanical requirements of the thresher's drum or concave assembly. Under the Harmonized System, parts of machinery from heading 8433 are grouped together in the 8433.90 subheading, provided they are not excluded by Section or Chapter notes, such as those made of vulcanized rubber or textile materials. The technical specifications of these screens, including hole size and curvature, are engineered for specific crop types, further solidifying their status as dedicated machinery parts.
- Covers
- Perforated metal thresher screens
- Concave screens for combine harvesters
- Sieve plates for threshing units
- Rotary thresher screen cylinders
- Adjustable louvered sieves for grain separation
- Also under 8433.90
- John Deere combine parts
- CLAAS baler components
- AGCO mower blades
- CNH Industrial harvester parts
- Krone forage harvester knives
Codes often confused with 8433.90
Common mistake. A frequent error is classifying these screens under HS code 7314, which covers cloth, grill, netting, and fencing of iron or steel wire. While the material may be steel, 7314 is for general-purpose materials, whereas 8433.90 is specific to the function of the part. Another common misclassification is HS code 8437.90, which covers parts for machinery used in the cleaning, sorting, or grading of seed, grain, or dried leguminous vegetables. The distinction lies in whether the screen is part of a field harvester (8433) or an industrial stationary grain cleaner (8437).
Top exporters and importers of HS 843390 (the code used for thresher screens), 2025
In 2025, the largest exporter of HS 843390 (the code used for thresher screens) in UN Comtrade data was Germany, with 14% of world exports; the largest importer in UN Comtrade data was the United States, with 16% 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 843390, not only thresher screens.
Top exporters 2025 · share of world exports
- 1 Germany $1.0B 14% of world exports
- 2 China $1.0B 14% of world exports
- 3 United States $958M 13% of world exports
World total: $7.1B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $1.2B 16% of world imports
- 2 France $773M 10% of world imports
- 3 Germany $770M 10% of world imports
World total: $7.4B 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 codes for thresher screens
Brazil splits HS 8433.90 into 2 NCM codes. Pick the one that matches your product:
- 8433.90.10Parts of lawn mowers
- 8433.90.90Other parts of harvesting and threshing machinery
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about thresher screens
What is the HS code for Thresher screens?
The HS code for Thresher screens is 843390 (Harvesting machinery; parts, including parts of threshing machinery, straw or fodder balers and grass or hay mowers). The primary HS code for thresher screens is 8433.90, as they are considered parts of harvesting and threshing machinery.
How do I classify Thresher screens for customs?
Thresher screens is classified under HS code 843390 — Harvesting machinery; parts, including parts of threshing machinery, straw or fodder balers and grass or hay mowers. This is a 6-digit subheading level code.
Does the material of the screen change the HS code?
Generally, no, provided the screen is a dedicated part of the machinery. However, if the screen is made of a material like textile or reinforced rubber, it might be classified according to its constituent material under different chapters.
Which countries are the top exporters of thresher screens (HS 843390)?
In 2025, the top exporters of HS 843390 (the code used for thresher screens) in UN Comtrade data were Germany ($1.0B, 14% of world exports), China ($1.0B) and the United States ($958M). World exports came to about $7.1B, 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 thresher screens (HS 843390)?
In 2025, the top importers of HS 843390 (the code used for thresher screens) in UN Comtrade data were the United States ($1.2B, 16% of world imports), France ($773M) and Germany ($770M). World imports came to about $7.4B, 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 Thresher screens the same in all countries?
The base HS code 843390 for Thresher screens 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 thresher screens in Brazil?
Brazil splits HS 843390 into 2 NCM codes, so the right one for thresher screens depends on the product's details: 8433.90.10 (Parts of lawn mowers), 8433.90.90 (Other parts of harvesting and threshing machinery).