# HS code 8412.21: Hydraulic power engines and motors, linear acting (cylinders)

> HS code 8412.21 covers hydraulic power engines and motors, linear acting (cylinders). It sits in heading 84.12 (other engines and motors) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof). Other goods of heading 84.12 are classified under 8412.10 (reaction engines other than turbo-jets), 8412.29 (hydraulic power engines and motors, other), 8412.31 (pneumatic power engines and motors, linear acting (cylinders)), 8412.39 (pneumatic power engines and motors, other) or 2 others.

Source: https://staging.border.bot/hs-codes/841221
Last updated: 13 October 2026

[HS codes](https://staging.border.bot/hs-codes) / [Chapter 84](https://staging.border.bot/hs-codes/84) / [84.12](https://staging.border.bot/hs-codes/8412) / [8412.21](https://staging.border.bot/hs-codes/841221)

## Key facts

- HS code: 8412.21
- Covers: Hydraulic power engines and motors, linear acting (cylinders)
- Heading: [84.12: Other engines and motors](https://staging.border.bot/hs-codes/8412)
- Chapter: [84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof](https://staging.border.bot/hs-codes/84)
- Edition: HS2022
- Duty rates: [Set by each country’s tariff](https://staging.border.bot/countries)

## What this code covers

HS code 8412.21 covers hydraulic power engines and motors, linear acting (cylinders).

The legal text of the subheading is “Hydraulic power engines and motors: Linear acting (cylinders)”, read under “Hydraulic power engines and motors”, in HS2022.

## What it doesn’t cover

Other goods of heading 84.12 are classified under 8412.10 (reaction engines other than turbo-jets), 8412.29 (hydraulic power engines and motors, other), 8412.31 (pneumatic power engines and motors, linear acting (cylinders)), 8412.39 (pneumatic power engines and motors, other) or 2 others.

- [8412.10](https://staging.border.bot/hs-codes/841210) Reaction engines other than turbo-jets
- [8412.29](https://staging.border.bot/hs-codes/841229) Hydraulic power engines and motors: Other
- [8412.31](https://staging.border.bot/hs-codes/841231) Pneumatic power engines and motors: Linear acting (cylinders)
- [8412.39](https://staging.border.bot/hs-codes/841239) Pneumatic power engines and motors: Other
- [8412.80](https://staging.border.bot/hs-codes/841280) Other
- [8412.90](https://staging.border.bot/hs-codes/841290) Parts

## How it is structured

8412.21 is a six-digit subheading. Its first two digits, 84, are the chapter; the first four, 8412, are heading 84.12; the last two, 21, 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 84.12: Other engines and motors
- Within the heading: Hydraulic power engines and motors
- Subheading 8412.21: Linear acting (cylinders)

## In other countries

No national tariff lines under 8412.21 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 8412.21 at six digits and add their own digits after it.

- Previous subheading: [8412.10](https://staging.border.bot/hs-codes/841210) Reaction engines other than turbo-jets
- Next subheading: [8412.29](https://staging.border.bot/hs-codes/841229) Hydraulic power engines and motors: Other

## Frequently asked questions

### What does HS code 8412.21 cover?

HS code 8412.21 covers hydraulic power engines and motors, linear acting (cylinders).

### Which heading and chapter is HS code 8412.21 in?

HS code 8412.21 is in heading 84.12 (other engines and motors) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof).

### Where are goods of heading 84.12 classified when 8412.21 doesn’t fit?

Other goods of heading 84.12 are classified under 8412.10 (reaction engines other than turbo-jets), 8412.29 (hydraulic power engines and motors, other), 8412.31 (pneumatic power engines and motors, linear acting (cylinders)), 8412.39 (pneumatic power engines and motors, other) or 2 others.

## Sources and updates

The Harmonized System legal text comes from border.bot release 1 (edition HS 2022), imported from a file, and has been live since 13 October 2026.

This page was last updated on 13 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://staging.border.bot/hs-codes/841221.json