Chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
HTS heading 8421: Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof
29 numbered lines under heading 8421, including 24 10-digit statistical lines. The first six digits are the international HS subheading; the general column is the normal US duty rate.
| HTS code | Description | Unit | General | Special | Column 2 |
|---|---|---|---|---|---|
| 8421 | Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: | ||||
| Centrifuges, including centrifugal dryers: | |||||
| 8421.11.00.00 | Cream separatorsNote: See 9903.90.08. | No. | Free | 25% | |
| 8421.12.00.00 | Clothes-dryers | No. | Free | 25% | |
| 8421.19.00.00 | Other | No. | 1.3% | Free (A,AU,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% |
| Filtering or purifying machinery and apparatus for liquids: | |||||
| 8421.21.00.00 | For filtering or purifying water | No. | Free | 35% | |
| 8421.22.00.00 | For filtering or purifying beverages other than water | No. | Free | 35% | |
| 8421.23.00.00 | Oil or fuel filters for internal combustion engines | No. | 2.5% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8421.29.00 | Other | Free | 35% | ||
| 8421.29.00.05 | Refrigerant recovery and recycling units | No. | |||
| Other: | |||||
| 8421.29.00.15 | Oil-separation equipment | No. | |||
| Other: | |||||
| 8421.29.00.40 | Hydraulic fluid power filters, rated at 1,000 kPa or greater | No. | |||
| 8421.29.00.65 | Other | No. | |||
| Filtering or purifying machinery and apparatus for gases: | |||||
| 8421.31.00.00 | Intake air filters for internal combustion engines | No. | 2.5% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8421.32.00.00 | Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines | No. | Free | 35% | |
| 8421.39.01 | Other | Free | 35% | ||
| Dust collection and air purification equipment: | |||||
| 8421.39.01.05 | For machine tools of headings 8456 through 8465, inclusive | kg | |||
| 8421.39.01.15 | Other | kg | |||
| Other: | |||||
| Industrial gas cleaning equipment: | |||||
| 8421.39.01.20 | Electrostatic precipitators | No. | |||
| 8421.39.01.30 | Other | No. | |||
| 8421.39.01.40 | Gas separation equipment | No. | |||
| Other: | |||||
| 8421.39.01.60 | Pneumatic fluid power filters, rated at 550 kPa or greater | No. | |||
| 8421.39.01.90 | Other | kg | |||
| Parts: | |||||
| 8421.91 | Of centrifuges, including centrifugal dryers: | ||||
| 8421.91.20.00 | Drying chambers for the clothes-dryers of subheading 8421.12 and other parts of clothes-dryers incorporating drying chambers | No. | Free | 25% | |
| 8421.91.40.00 | Furniture designed to receive the clothes-dryers of subheading 8421.12 | No. | Free | 25% | |
| 8421.91.60.00 | Other | kg | Free | 25% | |
| 8421.99.01 | Other | Free | 35% | ||
| 8421.99.01.40 | Parts of machinery and apparatus for filtering or purifying water | kg | |||
| 8421.99.01.80 | Other | kg |
Statistical (10-digit) lines without a rate use the rate of the 8-digit line above them. Additional duties such as Section 301 and Section 232 may apply; check them with the tariff checker.
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Request a free auditSource: Harmonized Tariff Schedule of the United States, 2026 HTS Revision 20 (effective 2026-09-28), U.S. International Trade Commission (hts.usitc.gov), imported 2026-10-07. Reference only; not legal or customs advice or a binding classification. Additional duties under Chapter 99 may apply. ShipWave is not affiliated with the USITC or U.S. Customs and Border Protection.