Key facts
- HS code
- 8421.99
- Covers
- Parts
- Edition
- HS2022
- Duty rates
- Set by each country’s tariff
Summary
HS code 8421.99 covers parts, other than those classified in 8421.91. It sits in heading 84.21 (centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof). Other goods of heading 84.21 are classified under 8421.11 (centrifuges, including centrifugal dryers, cream separators), 8421.12 (centrifuges, including centrifugal dryers, clothes-dryers), 8421.19 (centrifuges, including centrifugal dryers, other), 8421.21 (filtering or purifying machinery and apparatus for liquids, for filtering or purifying water) or 7 others.
What this code covers
HS code 8421.99 covers parts, other than those classified in 8421.91.
The legal text of the subheading is “Parts: Other”, read under “Parts”, in HS2022.
What it doesn’t cover
Other goods of heading 84.21 are classified under 8421.11 (centrifuges, including centrifugal dryers, cream separators), 8421.12 (centrifuges, including centrifugal dryers, clothes-dryers), 8421.19 (centrifuges, including centrifugal dryers, other), 8421.21 (filtering or purifying machinery and apparatus for liquids, for filtering or purifying water) or 7 others.
- 8421.11Centrifuges, including centrifugal dryers: Cream separators
- 8421.12Centrifuges, including centrifugal dryers: Clothes-dryers
- 8421.19Centrifuges, including centrifugal dryers: Other
- 8421.21Filtering or purifying machinery and apparatus for liquids: For filtering or purifying water
- 8421.22Filtering or purifying machinery and apparatus for liquids: For filtering or purifying beverages other than water
- 8421.23Filtering or purifying machinery and apparatus for liquids: Oil or petrol-filters for internal combustion engines
- 8421.29Filtering or purifying machinery and apparatus for liquids: Other
- 8421.31Filtering or purifying machinery and apparatus for gases: Intake air filters for internal combustion engines
- 8421.32Filtering or purifying machinery and apparatus for gases: Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines
- 8421.39Filtering or purifying machinery and apparatus for gases: Other
- 8421.91Parts: Of centrifuges, including centrifugal dryers
How it is structured
8421.99 is a six-digit subheading. Its first two digits, 84, are the chapter; the first four, 8421, are heading 84.21; the last two, 99, identify the subheading within the heading.
Countries add their own digits after these six for their national tariff lines.
- Heading 84.21
- Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases
- Within the heading
- Parts
- Subheading 8421.99
- Other
In other countries
No national tariff lines under 8421.99 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 8421.99 at six digits and add their own digits after it.
Frequently asked questions
What does HS code 8421.99 cover?
HS code 8421.99 covers parts, other than those classified in 8421.91.
Which heading and chapter is HS code 8421.99 in?
HS code 8421.99 is in heading 84.21 (centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof).
Where are goods of heading 84.21 classified when 8421.99 doesn’t fit?
Other goods of heading 84.21 are classified under 8421.11 (centrifuges, including centrifugal dryers, cream separators), 8421.12 (centrifuges, including centrifugal dryers, clothes-dryers), 8421.19 (centrifuges, including centrifugal dryers, other), 8421.21 (filtering or purifying machinery and apparatus for liquids, for filtering or purifying water) or 7 others.
Sources and updates
The Harmonized System legal text comes from border.bot release 1 (edition HS 2022), imported from a file, and has been live since 13 October 2026.
This page was last updated on 13 October 2026.
Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.