# United States tariff lines under HS 8419.90

> The United States tariff splits HS 8419.90 (parts) into 8 national lines: 8419.90.10.00 (of instantaneous or storage water heaters), 8419.90.20.00 (of machinery and plant for making paper pulp, paper or paperboard), 8419.90.30.00 (of heat exchange units), 8419.90.50.40 (of medical, surgical or laboratory sterilizers) and 4 others. The general (MFN) duty differs by line: free on 8419.90.10.00, free on 8419.90.20.00, free on 8419.90.30.00, free on 8419.90.50.40, free on 8419.90.50.80, free on 8419.90.85.00, 4% on 8419.90.95.20 and 4% on 8419.90.95.80.

Source: https://border.bot/countries/united-states/hs-codes/841990
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 84](https://border.bot/countries/united-states/hs-codes/84) / [8419.90](https://border.bot/countries/united-states/hs-codes/841990)

## Key facts

- HS subheading: [8419.90](https://border.bot/hs-codes/841990)
- National lines: 8
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof

## United States lines under 8419.90

The United States tariff splits HS 8419.90 (parts) into 8 national lines: 8419.90.10.00 (of instantaneous or storage water heaters), 8419.90.20.00 (of machinery and plant for making paper pulp, paper or paperboard), 8419.90.30.00 (of heat exchange units), 8419.90.50.40 (of medical, surgical or laboratory sterilizers) and 4 others.

The general (MFN) duty differs by line: free on 8419.90.10.00, free on 8419.90.20.00, free on 8419.90.30.00, free on 8419.90.50.40, free on 8419.90.50.80, free on 8419.90.85.00, 4% on 8419.90.95.20 and 4% on 8419.90.95.80.

- [8419.90.10.00](https://border.bot/countries/united-states/hs-codes/8419901000) Parts, Of instantaneous or storage water heaters. Duty (MFN): free
- [8419.90.20.00](https://border.bot/countries/united-states/hs-codes/8419902000) Parts, Of machinery and plant for making paper pulp, paper or paperboard. Duty (MFN): free
- [8419.90.30.00](https://border.bot/countries/united-states/hs-codes/8419903000) Parts, Of heat exchange units. Duty (MFN): free
- [8419.90.50.40](https://border.bot/countries/united-states/hs-codes/8419905040) Parts, Other, Of molten-salt-cooled acrylic acid reactors; of medical, surgical or laboratory sterilizers, Of medical, surgical or laboratory sterilizers. Duty (MFN): free
- [8419.90.50.80](https://border.bot/countries/united-states/hs-codes/8419905080) Parts, Other, Of molten-salt-cooled acrylic acid reactors; of medical, surgical or laboratory sterilizers, Other. Duty (MFN): free
- [8419.90.85.00](https://border.bot/countries/united-states/hs-codes/8419908500) Parts, Other, Of electromechanical tools for working in the hand with self-contained electric motor. Duty (MFN): free
- [8419.90.95.20](https://border.bot/countries/united-states/hs-codes/8419909520) Parts, Other, Other, Of an apparatus of a type used in restaurants, hotels or similar locations. Duty (MFN): 4%
- [8419.90.95.80](https://border.bot/countries/united-states/hs-codes/8419909580) Parts, Other, Other, Other. Duty (MFN): 4%

## In other countries

No other national tariff on border.bot has live lines under 8419.90 yet.

- [The Harmonized System text for 8419.90](https://border.bot/hs-codes/841990)

- Previous subheading: [8419.89](https://border.bot/countries/united-states/hs-codes/841989) Other
- Next subheading: [8420.10](https://border.bot/countries/united-states/hs-codes/842010) Calendering or other rolling machines

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 8419.90?

The United States tariff splits HS 8419.90 (parts) into 8 national lines: 8419.90.10.00 (of instantaneous or storage water heaters), 8419.90.20.00 (of machinery and plant for making paper pulp, paper or paperboard), 8419.90.30.00 (of heat exchange units), 8419.90.50.40 (of medical, surgical or laboratory sterilizers) and 4 others.

### What is the duty on HS 8419.90 in the United States?

The general (MFN) duty differs by line: free on 8419.90.10.00, free on 8419.90.20.00, free on 8419.90.30.00, free on 8419.90.50.40, free on 8419.90.50.80, free on 8419.90.85.00, 4% on 8419.90.95.20 and 4% on 8419.90.95.80.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 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.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/841990.json