# United States tariff line 8431.10.00.90: Other

> In the United States tariff, line 8431.10.00.90 covers parts suitable for use solely or principally with the machinery of headings 8425 to 8430, of machinery of heading 8425. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 8431.10 in heading 84.31 (chapter 84).

Source: https://border.bot/countries/united-states/hs-codes/8431100090
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) / [8431.10](https://border.bot/countries/united-states/hs-codes/843110) / [8431.10.00.90](https://border.bot/countries/united-states/hs-codes/8431100090)

## Key facts

- Tariff line: 8431.10.00.90
- Covers: Parts suitable for use solely or principally with the machinery of headings 8425 to 8430, of machinery of heading 8425
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [8431.10](https://border.bot/hs-codes/843110)

## What this line covers

In the United States tariff, line 8431.10.00.90 covers parts suitable for use solely or principally with the machinery of headings 8425 to 8430, of machinery of heading 8425.

Its legal text is “Other”, read under “Of machinery of heading 8425”.

## How it is structured

It falls under HS subheading 8431.10 in heading 84.31 (chapter 84). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
- Heading 84.31: Parts suitable for use solely or principally with the machinery of headings 8425 to 8430
- Subheading 8431.10: Of machinery of heading 8425
- Line 8431.10.00.90: Other

## Duty

Goods under this line enter free of general (MFN) duty.

The rate is published on 8431.10.00.

## In other countries

No other national tariff on border.bot has live lines under 8431.10 yet.

- [The Harmonized System text for 8431.10](https://border.bot/hs-codes/843110)

## Other lines under 8431.10

- [8431.10.00.10](https://border.bot/countries/united-states/hs-codes/8431100010) Of machinery of subheading 8425.11 or 8425.19

- Previous line: [8431.10.00.10](https://border.bot/countries/united-states/hs-codes/8431100010) Of machinery of subheading 8425.11 or 8425.19
- Next line: [8431.20.00.00](https://border.bot/countries/united-states/hs-codes/8431200000) Of machinery of heading 8427

## Frequently asked questions

### What does tariff line 8431.10.00.90 cover in the United States tariff?

In the United States tariff, line 8431.10.00.90 covers parts suitable for use solely or principally with the machinery of headings 8425 to 8430, of machinery of heading 8425.

### What is the general (MFN) duty on 8431.10.00.90 in the United States?

Goods under this line enter free of general (MFN) duty. The rate is published on 8431.10.00.

## 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/8431100090.json