# United States tariff lines under HS 8406.90

> The United States tariff splits HS 8406.90 (parts) into 9 national lines: 8406.90.20.00 (rotors, finished for final assembly), 8406.90.30.00 (rotors, not further advanced than cleaned or machined for removal of fins, gates, sprues, and risers, or to permit location in finishing machinery), 8406.90.40.00 (blades, rotating or stationary), 8406.90.45.40 (rotors or spindles and rotor or spindle assemblies) and 5 others.

Source: https://border.bot/countries/united-states/hs-codes/840690
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 84](https://border.bot/countries/united-states/hs-codes/84) / [8406.90](https://border.bot/countries/united-states/hs-codes/840690)

## Key facts

- HS subheading: [8406.90](https://border.bot/hs-codes/840690)
- National lines: 9
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof

## United States lines under 8406.90

The United States tariff splits HS 8406.90 (parts) into 9 national lines: 8406.90.20.00 (rotors, finished for final assembly), 8406.90.30.00 (rotors, not further advanced than cleaned or machined for removal of fins, gates, sprues, and risers, or to permit location in finishing machinery), 8406.90.40.00 (blades, rotating or stationary), 8406.90.45.40 (rotors or spindles and rotor or spindle assemblies) and 5 others.

- [8406.90.20.00](https://border.bot/countries/united-states/hs-codes/8406902000) Parts, Of steam turbines, Rotors, finished for final assembly. Duty (MFN): 5%
- [8406.90.30.00](https://border.bot/countries/united-states/hs-codes/8406903000) Parts, Of steam turbines, Rotors, not further advanced than cleaned or machined for removal of fins, gates, sprues, and risers, or to permit location in finishing machinery. Duty (MFN): 5%
- [8406.90.40.00](https://border.bot/countries/united-states/hs-codes/8406904000) Parts, Of steam turbines, Blades, rotating or stationary. Duty (MFN): 5%
- [8406.90.45.40](https://border.bot/countries/united-states/hs-codes/8406904540) Parts, Of steam turbines, Other, Rotors or spindles and rotor or spindle assemblies. Duty (MFN): 5%
- [8406.90.45.80](https://border.bot/countries/united-states/hs-codes/8406904580) Parts, Of steam turbines, Other, Other. Duty (MFN): 5%
- [8406.90.50.00](https://border.bot/countries/united-states/hs-codes/8406905000) Parts, Other, Rotors, finished for final assembly. Duty (MFN): free
- [8406.90.60.00](https://border.bot/countries/united-states/hs-codes/8406906000) Parts, Other, Rotors, not further advanced than cleaned or machined for removal of fins, gates, sprues, and risers, or to permit location in finishing machinery. Duty (MFN): free
- [8406.90.70.00](https://border.bot/countries/united-states/hs-codes/8406907000) Parts, Other, Blades, rotating or stationary. Duty (MFN): free
- [8406.90.75.00](https://border.bot/countries/united-states/hs-codes/8406907500) Parts, Other, Other. Duty (MFN): free

## In other countries

No other national tariff on border.bot has live lines under 8406.90 yet.

- [The Harmonized System text for 8406.90](https://border.bot/hs-codes/840690)

- Previous subheading: [8406.82](https://border.bot/countries/united-states/hs-codes/840682) Of an output not exceeding 40 MW
- Next subheading: [8407.10](https://border.bot/countries/united-states/hs-codes/840710) Spark-ignition reciprocating or rotary internal combustion piston engines

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 8406.90?

The United States tariff splits HS 8406.90 (parts) into 9 national lines: 8406.90.20.00 (rotors, finished for final assembly), 8406.90.30.00 (rotors, not further advanced than cleaned or machined for removal of fins, gates, sprues, and risers, or to permit location in finishing machinery), 8406.90.40.00 (blades, rotating or stationary), 8406.90.45.40 (rotors or spindles and rotor or spindle assemblies) and 5 others.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 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.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/840690.json