# 840490 — Auxiliary plant for use with boilers of heading 8402 or 8403 (for example,…: Parts

HS code 840490 classifies Auxiliary plant for use with boilers of heading 8402 or 8403 (for example,…: Parts. It belongs to Chapter 84 (Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof) of Section XVI (Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles) of the Harmonized System. Duty rates are recorded for 1 country.

> Section XVI · Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles
> Chapter 84 · Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof

**HS code:** `840490`

## Description

Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economisers, superheaters, soot removers, gas recoverers); condensers for steam or other vapour power units : Parts

## Duty rates

| Country | Rate | Programme |
| --- | --- | --- |
| US United States | 3.5% | MFN |

Rates effective as of 2026-01-01.

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Source: https://hscode.eximagent.ai/84/840490
Last updated: 2026-06-03
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