HS code · 6-digit subheading
HS Code 4009.21 – Rubber; vulcanised (other than hard rubber), tubing, piping and hoses, reinforced or otherwise combined only with metal, without fittings
HS code 4009.21 is the 6-digit subheading for rubber, vulcanised (other than hard rubber), tubing, piping and hoses, reinforced or otherwise combined only with metal, without fittings. It is used for hydraulic hose (metal reinforced, no fittings), industrial rubber tubing (metal reinforced), automotive coolant hose (metal reinforced), high-pressure air hose (metal reinforced) and fuel line hose (metal reinforced).
What HS 4009.21 covers
This category covers vulcanized rubber tubing, piping, and hoses that are reinforced or otherwise combined solely with metal, and importantly, supplied without fittings. These products are engineered for demanding industrial applications where strength, flexibility, and resistance to high pressure, extreme temperatures, or corrosive chemicals are critical. They are widely utilized in hydraulic systems, industrial machinery, automotive engines, and various fluid transfer applications across sectors like construction, mining, and agriculture. Importers and exporters include specialized manufacturers of industrial hoses, automotive suppliers, and distributors. Key trade considerations involve the specific type of rubber (e.g., EPDM, NBR, SBR), the nature of the metal reinforcement (e.g., steel wire braid), pressure ratings, and compliance with stringent industry standards such as SAE or DIN.
- Covers
- Hydraulic hose (metal reinforced, no fittings)
- Industrial rubber tubing (metal reinforced)
- Automotive coolant hose (metal reinforced)
- High-pressure air hose (metal reinforced)
- Fuel line hose (metal reinforced)
- Steam hose (metal reinforced)
- Oil transfer hose (metal reinforced)
- Examples
- Gates (hydraulic hose)
- Parker Hannifin (industrial hose)
- Eaton (fluid conveyance)
- Continental (automotive hose)
- Manuli Hydraulics
Codes often confused with 4009.21
Common mistake. Often confused with 400922 (same products *with* fittings) if the presence or absence of fittings is not carefully checked. Also, 400911 (not reinforced or combined with other materials) if the metal reinforcement is missed.
Top exporters and importers of HS code 400921, 2025
In 2025, the largest exporter of HS code 400921 in UN Comtrade data was China, with 21% of world exports; the largest importer in UN Comtrade data was the United States, with 15% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 China $419M 21% of world exports
- 2 Italy $270M 14% of world exports
- 3 United States $200M 10% of world exports
World total: $2.0B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $282M 15% of world imports
- 2 Germany $191M 9.9% of world imports
- 3 Canada $120M 6.2% of world imports
World total: $1.9B 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 4009.21 2
Brazil splits HS 4009.21 into 2 NCM codes, Mercosur's 8-digit tariff lines.
- 4009.21.10 Metal-only unfitted rubber hoses, burst 17.3 MPa+Com uma pressão de ruptura igual ou superior a 17,3 MPa
- 4009.21.90 Metal-only unfitted rubber hoses, under 17.3 MPaOutros
All Brazil NCM codes in heading 40.09 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 4009.21
What is HS code 400921?
HS code 400921 is a 6-digit subheading in the Harmonized System that covers: Rubber; vulcanised (other than hard rubber), tubing, piping and hoses, reinforced or otherwise combined only with metal, without fittings. This category covers vulcanized rubber tubing, piping, and hoses that are reinforced or otherwise combined solely with metal, and importantly, supplied without fittings. These products are engineered for demanding industrial applications where strength, flexibility, and resistance to high pressure, extreme temperatures, or corrosive chemicals are critical. They are widely utilized in hydraulic systems, industrial machinery, automotive engines, and various fluid transfer applications across sectors like construction, mining, and agriculture. Importers and exporters include specialized manufacturers of industrial hoses, automotive suppliers, and distributors. Key trade considerations involve the specific type of rubber (e.g., EPDM, NBR, SBR), the nature of the metal reinforcement (e.g., steel wire braid), pressure ratings, and compliance with stringent industry standards such as SAE or DIN.
What products fall under HS code 400921?
Hydraulic hose (metal reinforced, no fittings), industrial rubber tubing (metal reinforced), automotive coolant hose (metal reinforced), high-pressure air hose (metal reinforced), fuel line hose (metal reinforced), steam hose (metal reinforced), oil transfer hose (metal reinforced)
What are common misclassifications for HS code 400921?
Often confused with 400922 (same products *with* fittings) if the presence or absence of fittings is not carefully checked. Also, 400911 (not reinforced or combined with other materials) if the metal reinforcement is missed.
Which countries are the top exporters of goods under HS code 400921?
In 2025, the top exporters of HS code 400921 in UN Comtrade data were China ($419M, 21% of world exports), Italy ($270M) and the United States ($200M). World exports came to about $2.0B, 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 goods under HS code 400921?
In 2025, the top importers of HS code 400921 in UN Comtrade data were the United States ($282M, 15% of world imports), Germany ($191M) and Canada ($120M). World imports came to about $1.9B, 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.
How is HS code 400921 structured?
HS code 400921 is a 6-digit subheading under the Harmonized System. The first 2 digits (40) identify the chapter, digits 3-4 (09) identify the heading, and digits 5-6 (21) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 400921?
Brazil splits HS code 400921 into 2 NCM codes: 4009.21.10 (Metal-only unfitted rubber hoses, burst 17.3 MPa+), 4009.21.90 (Metal-only unfitted rubber hoses, under 17.3 MPa). The first 6 digits of each match the HS code.