# HS code 8403.10: Boilers

> HS code 8403.10 covers boilers. It sits in heading 84.03 (central heating boilers other than those of heading 84.02) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof). Other goods of heading 84.03 are classified under 8403.90 (parts). National tariff lines under 8403.10 are live on border.bot for the United States (1 line, also used by 1 other country).

Source: https://border.bot/hs-codes/840310
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 84](https://border.bot/hs-codes/84) / [84.03](https://border.bot/hs-codes/8403) / [8403.10](https://border.bot/hs-codes/840310)

## Key facts

- HS code: 8403.10
- Covers: Boilers
- Heading: [84.03: Central heating boilers other than those of heading 84.02](https://border.bot/hs-codes/8403)
- Chapter: [84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof](https://border.bot/hs-codes/84)
- Edition: HS2022
- Duty in the United States: [See its 1 line](https://border.bot/countries/united-states/hs-codes/840310)

## What this code covers

HS code 8403.10 covers boilers.

The legal text of the subheading is “Boilers”, in HS2022.

## What it doesn’t cover

Other goods of heading 84.03 are classified under 8403.90 (parts).

- [8403.90](https://border.bot/hs-codes/840390) Parts

## How it is structured

8403.10 is a six-digit subheading. Its first two digits, 84, are the chapter; the first four, 8403, are heading 84.03; the last two, 10, identify the subheading within the heading.

Countries add their own digits after these six for their national tariff lines.

- Chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
- Heading 84.03: Central heating boilers other than those of heading 84.02
- Subheading 8403.10: Boilers

## In other countries

National tariff lines under 8403.10 are live on border.bot for the United States (1 line, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/840310): 1 line, used by 1 other country

- Previous subheading: [8402.90](https://border.bot/hs-codes/840290) Parts
- Next subheading: [8403.90](https://border.bot/hs-codes/840390) Parts

## Frequently asked questions

### What does HS code 8403.10 cover?

HS code 8403.10 covers boilers.

### Which heading and chapter is HS code 8403.10 in?

HS code 8403.10 is in heading 84.03 (central heating boilers other than those of heading 84.02) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof).

### Where are goods of heading 84.03 classified when 8403.10 doesn’t fit?

Other goods of heading 84.03 are classified under 8403.90 (parts).

### Which countries’ tariffs list national lines under HS code 8403.10?

National tariff lines under 8403.10 are live on border.bot for the United States (1 line, also used by 1 other country).

## Sources and updates

The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.

This page was last updated on 11 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.

Machine-readable: https://border.bot/hs-codes/840310.json