# HS code 8457.20: Unit construction machines (single station)

> HS code 8457.20 covers unit construction machines (single station). It sits in heading 84.57 (machining centres, unit construction machines (single station) and multi-station transfer machines, for working metal) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof). Other goods of heading 84.57 are classified under 8457.10 (machining centres) or 8457.30 (multi-station transfer machines). National tariff lines under 8457.20 are live on border.bot for the United States (2 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/845720
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 84](https://border.bot/hs-codes/84) / [84.57](https://border.bot/hs-codes/8457) / [8457.20](https://border.bot/hs-codes/845720)

## Key facts

- HS code: 8457.20
- Covers: Unit construction machines (single station)
- Heading: [84.57: Machining centres, unit construction machines (single station) and multi-station transfer machines, for working metal](https://border.bot/hs-codes/8457)
- 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 2 lines](https://border.bot/countries/united-states/hs-codes/845720)

## What this code covers

HS code 8457.20 covers unit construction machines (single station).

The legal text of the subheading is “Unit construction machines (single station)”, in HS2022.

## What it doesn’t cover

Other goods of heading 84.57 are classified under 8457.10 (machining centres) or 8457.30 (multi-station transfer machines).

- [8457.10](https://border.bot/hs-codes/845710) Machining centres
- [8457.30](https://border.bot/hs-codes/845730) Multi-station transfer machines

## How it is structured

8457.20 is a six-digit subheading. Its first two digits, 84, are the chapter; the first four, 8457, are heading 84.57; the last two, 20, 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 84.57: Machining centres, unit construction machines (single station) and multi-station transfer machines, for working metal
- Subheading 8457.20: Unit construction machines (single station)

## In other countries

National tariff lines under 8457.20 are live on border.bot for the United States (2 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/845720): 2 lines, used by 1 other country

- Previous subheading: [8457.10](https://border.bot/hs-codes/845710) Machining centres
- Next subheading: [8457.30](https://border.bot/hs-codes/845730) Multi-station transfer machines

## Frequently asked questions

### What does HS code 8457.20 cover?

HS code 8457.20 covers unit construction machines (single station).

### Which heading and chapter is HS code 8457.20 in?

HS code 8457.20 is in heading 84.57 (machining centres, unit construction machines (single station) and multi-station transfer machines, for working metal) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof).

### Where are goods of heading 84.57 classified when 8457.20 doesn’t fit?

Other goods of heading 84.57 are classified under 8457.10 (machining centres) or 8457.30 (multi-station transfer machines).

### Which countries’ tariffs list national lines under HS code 8457.20?

National tariff lines under 8457.20 are live on border.bot for the United States (2 lines, 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/845720.json