8421.91

6-digit heading

Of centrifuges, including centrifugal dryers

This is a 6-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.

Duty rates for HTS 8421.91
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.

Estimate duty for this code

Where this sits in the schedule

The tariff schedule is read top-down: each line inherits the wording of the categories above it.

Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Parts:

Codes within Of centrifuges, including centrifugal dryers

3 more specific lines fall under 8421.91.

Chapter 84: Machinery and Mechanical Appliances; Parts Thereof

Browse every code in this chapter to compare neighbouring classifications.

View Chapter 84

Source: 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.gov Report an error with this code How this data is built