HS chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
Last updated
Key facts
- Chapter
- 84
- Description
- Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
- Headings
- 86
- Subheadings
- 538
- Edition
- HS2022
Summary
HS chapter 84 covers nuclear reactors, boilers, machinery and mechanical appliances; parts thereof. It has 86 headings, 84.01 to 84.87, and 538 six-digit subheadings in HS2022. National tariff lines under chapter 84 are live on border.bot for the United States (1,706 lines, also used by 1 other country).
What this chapter covers
HS chapter 84 covers nuclear reactors, boilers, machinery and mechanical appliances; parts thereof.
It has 86 headings, 84.01 to 84.87, and 538 six-digit subheadings in HS2022.
Subheadings 501 to 538 of 538, page 6 of 6.
84.82 Ball or roller bearings
- 8482.10Ball bearings
- 8482.20Tapered roller bearings, including cone and tapered roller assemblies
- 8482.30Spherical roller bearings
- 8482.40Needle roller bearings, including cage and needle roller assemblies
- 8482.50Other cylindrical roller bearings, including cage and roller assemblies
- 8482.80Other, including combined ball/roller bearings
- 8482.91Parts: Balls, needles and rollers
- 8482.99Parts: Other
84.83 Transmission shafts (including cam shafts and crank shafts) and cranks; bearing housings and plain shaft bearings; gears and gearing; ball or roller screws; gear boxes and other speed changers, including torque converters; flywheels and pulleys, including pulley blocks; clutches and shaft couplings (including universal joints)
- 8483.10Transmission shafts (including cam shafts and crank shafts) and cranks
- 8483.20Bearing housings, incorporating ball or roller bearings
- 8483.30Bearing housings, not incorporating ball or roller bearings; plain shaft bearings
- 8483.40Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements presented separately; ball or roller screws; gear boxes and other speed changers, including torque converters
- 8483.50Flywheels and pulleys, including pulley blocks
- 8483.60Clutches and shaft couplings (including universal joints)
- 8483.90Toothed wheels, chain sprockets and other transmission elements presented separately; parts
84.86 Machines and apparatus of a kind used solely or principally for the manufacture of semiconductor boules or wafers, semiconductor devices, electronic integrated circuits or flat panel displays; machines and apparatus specified in Note 11 (C) to this Chapter; parts and accessories
- 8486.10Machines and apparatus for the manufacture of boules or wafers
- 8486.20Machines and apparatus for the manufacture of semiconductor devices or of electronic integrated circuits
- 8486.30Machines and apparatus for the manufacture of flat panel displays
- 8486.40Machines and apparatus specified in Note 11 (C) to this Chapter
- 8486.90Parts and accessories
What it doesn’t cover
Chapter 83, before it, covers miscellaneous articles of base metal; chapter 85, after it, covers electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles.
How it is structured
Chapter 84 is the first level of the Harmonized System. Its headings add two digits to the chapter number (84.01), and each heading's subheadings add two more.
In other countries
National tariff lines under chapter 84 are live on border.bot for the United States (1,706 lines, also used by 1 other country).
- United States1,706 lines, used by 1 other country
Frequently asked questions
What does HS chapter 84 cover?
HS chapter 84 covers nuclear reactors, boilers, machinery and mechanical appliances; parts thereof.
How many headings and subheadings are in HS chapter 84?
HS chapter 84 has 86 headings and 538 six-digit subheadings in HS2022.
Which countries’ tariffs list national lines in HS chapter 84?
National tariff lines under chapter 84 are live on border.bot for the United States (1,706 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.