Heading 8421
HTS code 8421 — Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof
- Tariff lines
- 24
- General duty
- General duty rates from 1.3% to 2.5%, with 21 duty-free lines
Tariff lines under heading 8421
Full 10-digit codes with their general (MFN) duty rates. The correct line depends on the product's material, construction, and use.
| HTS code | Description | General rate | Unit |
|---|---|---|---|
| 8421.11.0000 | Cream separators (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof > Centrifuges, including centrifugal dryers) | Free | No. |
| 8421.12.0000 | Clothes-dryers (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof > Centrifuges, including centrifugal dryers) | Free | No. |
| 8421.19.0000 | Other (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof > Centrifuges, including centrifugal dryers) | 1.3% | No. |
| 8421.21.0000 | For filtering or purifying water (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof > Filtering or purifying machinery and apparatus for liquids) | Free | No. |
| 8421.22.0000 | For filtering or purifying beverages other than water (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof > Filtering or purifying machinery and apparatus for liquids) | Free | No. |
| 8421.23.0000 | Oil or fuel filters for internal combustion engines (Centrifuges, 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% | No. |
| 8421.29.0005 | Refrigerant recovery and recycling units (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof > Filtering or purifying machinery and apparatus for liquids > Other) | Free | No. |
| 8421.29.0015 | Oil-separation equipment (Centrifuges, 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) | Free | No. |
| 8421.29.0040 | Hydraulic fluid power filters, rated at 1,000 kPa or greater (Centrifuges, 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) | Free | No. |
| 8421.29.0065 | Other (Centrifuges, 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) | Free | No. |
| 8421.31.0000 | Intake air filters for internal combustion engines (Centrifuges, 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% | No. |
| 8421.32.0000 | Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof > Filtering or purifying machinery and apparatus for gases) | Free | No. |
| 8421.39.0105 | For machine tools of headings 8456 through 8465, inclusive (Centrifuges, 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) | Free | kg |
| 8421.39.0115 | Other (Centrifuges, 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) | Free | kg |
| 8421.39.0120 | Electrostatic precipitators (Centrifuges, 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) | Free | No. |
| 8421.39.0130 | Other (Centrifuges, 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) | Free | No. |
| 8421.39.0140 | Gas separation equipment (Centrifuges, 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) | Free | No. |
| 8421.39.0160 | Pneumatic fluid power filters, rated at 550 kPa or greater (Centrifuges, 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) | Free | No. |
| 8421.39.0190 | Other (Centrifuges, 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) | Free | kg |
| 8421.91.2000 | Drying chambers for the clothes-dryers of subheading 8421.12 and other parts of clothes-dryers incorporating drying chambers (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof > Parts > Of centrifuges, including centrifugal dryers) | Free | No. |
| 8421.91.4000 | Furniture designed to receive the clothes-dryers of subheading 8421.12 (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof > Parts > Of centrifuges, including centrifugal dryers) | Free | No. |
| 8421.91.6000 | Other (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof > Parts > Of centrifuges, including centrifugal dryers) | Free | kg |
| 8421.99.0140 | Parts of machinery and apparatus for filtering or purifying water (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof > Parts > Other) | Free | kg |
| 8421.99.0180 | Other (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof > Parts > Other) | Free | kg |
Documents required to import under 8421
Customs paperwork typically required to import these goods into the United States. Conditional items depend on shipment value, transport mode, or origin.
- Commercial InvoiceRequired
- Packing ListRequired
- Bill of Lading / Airway BillRequired
- CBP Entry Summary (7501)Required
Prepared and filed by your customs broker
- CBP Entry / Release (3461)Required
Prepared and filed by your customs broker
- Customs Bond (CBP 301)Conditional
Required for formal entries — generally shipments valued over $2,500
Single-entry or continuous bond, obtained through your broker or a surety
- Importer Security Filing (ISF "10+2")Conditional
Required for ocean freight only
Filed electronically at least 24 hours before loading at the foreign port
- Importer ID Input Record (CBP 5106)Conditional
Required to establish or update your importer-of-record number with CBP
One-time setup for a new importer; not filed per shipment
- Entry Manifest (CBP 7533)Conditional
Alternative to the 3461 for informal, low-value, or contiguous-country entries
- FCC Declaration (Form 740)Conditional
Required for electronic devices that emit radio frequency
- FDA Radiation Declaration (Form 2877)Conditional
Required for products that emit radiation (X-ray, laser, microwave, etc.)
Common questions
- What is HTS code 8421?
- HTS heading 8421 covers centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof. It sits in Chapter 84 (machinery and mechanical appliances) of the US Harmonized Tariff Schedule and contains 24 tariff lines.
- What is the duty rate for HTS 8421?
- General duty rates from 1.3% to 2.5%, with 21 duty-free lines. The general rate applies to most-favoured-nation trading partners; goods from countries with a free trade agreement may qualify for a reduced or duty-free special rate.
- How many digits does a full HTS code have?
- US import entries require the full 10-digit HTS code. Heading 8421 is the first four digits — the remaining six narrow it down to the specific product, which is what determines the duty rate you actually pay.
Related headings in Chapter 84
- 8401Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof
- 8402Steam or other vapor generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers; parts thereof
- 8403Central heating boilers (other than those of heading 8402) and parts thereof
- 8404Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economizers, super-heaters, soot removers, gas recoverers); condensers for steam or other vapor power units; parts thereof
- 8405Producer gas or water gas generators, with or without their purifiers; acetylene gas generators and similar water process gas generators, with or without their purifiers; parts thereof
- 8406Steam turbines and other vapor turbines, and parts thereof
- 8407Spark-ignition reciprocating or rotary internal combustion piston engines
- 8408Compression-ignition internal combustion piston engines (diesel or semi-diesel engines)