Product classification

HS code for Screw conveyor: 8428.39

Elevators and conveyors, continuous-action, for goods or materials, n.e.c. in item no. 8428.20, 8428.31, 8428.32 or 8428.33.

Classification of screw conveyor under HS 8428.39

Screw conveyors, also known as auger conveyors, are classified under HS code 842839. This code serves as a residual category for continuous-action elevators and conveyors for goods or materials that are not specifically named in other subheadings of heading 8428. While 842832 covers bucket-type conveyors and 842833 covers belt-type conveyors, the screw conveyor utilizes a rotating helical screw blade within a tube or trough to move liquid or granular materials. Because the screw mechanism does not fit the technical definitions of pneumatic, bucket, or belt systems, it falls into the "other" category of 842839. This classification applies to the complete mechanical unit designed for the transport of materials. These machines are widely used in agriculture for grain handling and in industrial settings for moving powders, chemicals, or waste products.

Covers
  • Horizontal screw conveyors
  • Vertical auger conveyors
  • Flexible screw conveyors
  • Shaftless screw conveyors
  • Industrial auger systems for bulk solids
Also under 8428.39
  • FlexLink pallet conveyors
  • Dorner Manufacturing precision conveyors
  • SSI Schaefer chain conveyors
  • Hapman screw conveyors

Codes often confused with 8428.39

Common mistake. Screw conveyors are often misclassified under 842833 (belt conveyors) or 842820 (pneumatic elevators). They may also be incorrectly filed under 843139, which is the code for parts of conveyors rather than the complete machine. If the screw is part of a specific agricultural machine (like a combine harvester), it might be classified in Chapter 8433 instead.

8428.33Elevators and conveyors; continuous-action, for goods or materials, belt type, n.e.c. in item no. 8428.20 or 8428.318428.20Elevators and conveyors; pneumatic8431.39Machinery; parts of the machinery of heading no. 8428, (other than lifts, skip hoists or escalators)84.33Harvesting and threshing machinery, straw and fodder balers, grass or hay mowers; machines for cleaning, sorting or grading eggs, fruit or other agricultural produce, other than machinery of heading no 8437

Top exporters and importers of HS 842839 (the code used for screw conveyor), 2025

In 2025, the largest exporter of HS 842839 (the code used for screw conveyor) in UN Comtrade data was China, with 25% of world exports; the largest importer in UN Comtrade data was the United States, with 20% of world imports. Mexico reports $217M of its heading 8428 imports without product detail (confidential), so it may also belong among the top importers.

Figures cover everything classified under HS 842839, not only screw conveyor.

Top exporters 2025 · share of world exports

  1. 1 China $2.1B
  2. 2 Germany $1.1B
  3. 3 Italy $661M

World total: $8.2B Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 United States $1.6B
  2. 2 Germany $507M
  3. 3 Canada $301M

Mexico reports $217M of its heading 8428 imports without product detail (confidential), so it may also belong among the top importers.

World total: $8.0B 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 screw conveyor

Brazil splits HS 8428.39 into 4 NCM codes. Pick the one that matches your product:

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about screw conveyor

What is the HS code for Screw conveyor?

The HS code for Screw conveyor is 842839 (Elevators and conveyors; continuous-action, for goods or materials, n.e.c. in item no. 8428.20, 8428.31, 8428.32 or 8428.33). The standard HS code for a complete screw conveyor system is 842839.

How do I classify Screw conveyor for customs?

Screw conveyor is classified under HS code 842839 — Elevators and conveyors; continuous-action, for goods or materials, n.e.c. in item no. 8428.20, 8428.31, 8428.32 or 8428.33. This is a 6-digit subheading level code.

Are individual auger flights classified here?

No, individual components or replacement parts for a screw conveyor are typically classified under HS code 843139.

Which countries are the top exporters of screw conveyor (HS 842839)?

In 2025, the top exporters of HS 842839 (the code used for screw conveyor) in UN Comtrade data were China ($2.1B, 25% of world exports), Germany ($1.1B) and Italy ($661M). World exports came to about $8.2B, 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 screw conveyor (HS 842839)?

In 2025, the top importers of HS 842839 (the code used for screw conveyor) in UN Comtrade data were the United States ($1.6B, 20% of world imports), Germany ($507M) and Canada ($301M). World imports came to about $8.0B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Mexico reports $217M of its heading 8428 imports without product detail (confidential), so it may also belong among the top importers.

Is the HS code for Screw conveyor the same in all countries?

The base HS code 842839 for Screw conveyor 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 screw conveyor in Brazil?

Brazil splits HS 842839 into 4 NCM codes, so the right one for screw conveyor depends on the product's details: 8428.39.10 (Chain conveyors), 8428.39.20 (Powered roller conveyors), 8428.39.30 (Side-gripper newspaper conveyors), 8428.39.90 (Other continuous-action conveyors).