8421
4-digit headingCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof
This is a 4-digit heading — a category, not a filing code. Pick the more specific code beneath it that best matches your goods; only a 10-digit statistical code can be used on a customs entry.
Duty rates
No rate is published at this level — check the specific 10-digit statistical code beneath it.
| Rate | Value and what it means |
|---|---|
| General rate (Column 1) | See 10-digit codeColumn 1 general Applies to most trading partners — the standard "normal trade relations" rate. |
| Special rate (Column 1) | —Trade programs The country letters in parentheses are free trade agreement and preference programs. If your goods qualify under one of them, that rate replaces the general rate. |
| Column 2 rate | —Non-NTR Reserved for the small group of countries that do not have normal trade relations with the US (currently Cuba, North Korea, Russia and Belarus). Almost no importer uses this column — if you are shipping from anywhere else, ignore it. |
| Unit of quantity | — How CBP expects the quantity to be reported on the entry summary. |
Codes within Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof
28 more specific lines fall under 8421.
- 8421.11.00.00Cream separators10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Centrifuges, including centrifugal dryers:Free
- 8421.12.00.00Clothes-dryers10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Centrifuges, including centrifugal dryers:Free
- 8421.19.00.00Other10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Centrifuges, including centrifugal dryers:1.3%
- 8421.21.00.00For filtering or purifying water10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for liquids:Free
- 8421.22.00.00For filtering or purifying beverages other than water10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for liquids:Free
- 8421.23.00.00Oil or fuel filters for internal combustion engines10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for liquids:2.5%
- 8421.29.00Other8-digit subheadingCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for liquids:Free
- 8421.29.00.05Refrigerant recovery and recycling units10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for liquids: > Other
- 8421.29.00.15Oil-separation equipment10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for liquids: > Other > Other:
- 8421.29.00.40Hydraulic fluid power filters, rated at 1,000 kPa or greater10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for liquids: > Other > Other: > Other:
- 8421.29.00.65Other10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for liquids: > Other > Other: > Other:
- 8421.31.00.00Intake air filters for internal combustion engines10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for gases:2.5%
- 8421.32.00.00Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for gases:Free
- 8421.39.01Other8-digit subheadingCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for gases:Free
- 8421.39.01.05For machine tools of headings 8456 through 8465, inclusive10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for gases: > Other > Dust collection and air purification equipment:
- 8421.39.01.15Other10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for gases: > Other > Dust collection and air purification equipment:
- 8421.39.01.20Electrostatic precipitators10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for gases: > Other > Other: > Industrial gas cleaning equipment:
- 8421.39.01.30Other10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for gases: > Other > Other: > Industrial gas cleaning equipment:
- 8421.39.01.40Gas separation equipment10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for gases: > Other > Other:
- 8421.39.01.60Pneumatic fluid power filters, rated at 550 kPa or greater10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for gases: > Other > Other: > Other:
- 8421.39.01.90Other10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for gases: > Other > Other: > Other:
- 8421.91Of centrifuges, including centrifugal dryers6-digit headingCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Parts:
- 8421.91.20.00Drying chambers for the clothes-dryers of subheading 8421.12 and other parts of clothes-dryers incorporating drying chambers10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Parts: > Of centrifuges, including centrifugal dryers:Free
- 8421.91.40.00Furniture designed to receive the clothes-dryers of subheading 8421.1210-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Parts: > Of centrifuges, including centrifugal dryers:Free
- 8421.91.60.00Other10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Parts: > Of centrifuges, including centrifugal dryers:Free
- 8421.99.01Other8-digit subheadingCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Parts:Free
- 8421.99.01.40Parts of machinery and apparatus for filtering or purifying water10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Parts: > Other
- 8421.99.01.80Other10-digit statistical codeCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Parts: > Other
Chapter 84: Machinery and Mechanical Appliances; Parts Thereof
Browse every code in this chapter to compare neighbouring classifications.
View Chapter 84Source: USITC Harmonized Tariff Schedule, 2026 Basic Edition, Revision 16. Rate text is reproduced verbatim from the official export; category paths and duty estimates are derived.
Data loaded August 18, 2026.Check this chapter on hts.usitc.govReport an error with this codeHow this data is built