# United States tariff lines under HS 8466.91

> The United States tariff splits HS 8466.91 (other: For machines of heading 84.64) into 2 national lines: 8466.91.10.00 (cast-iron parts not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery) and 8466.91.50.00 (other). Every United States line under 8466.91 is free of general (MFN) duty.

Source: https://border.bot/countries/united-states/hs-codes/846691
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) / [8466.91](https://border.bot/countries/united-states/hs-codes/846691)

## Key facts

- HS subheading: [8466.91](https://border.bot/hs-codes/846691)
- Duty (MFN): Free
- National lines: 2
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof

## United States lines under 8466.91

The United States tariff splits HS 8466.91 (other: For machines of heading 84.64) into 2 national lines: 8466.91.10.00 (cast-iron parts not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery) and 8466.91.50.00 (other).

Every United States line under 8466.91 is free of general (MFN) duty.

- [8466.91.10.00](https://border.bot/countries/united-states/hs-codes/8466911000) Other, For machines of heading 8464, Cast-iron parts not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery. Duty (MFN): free
- [8466.91.50.00](https://border.bot/countries/united-states/hs-codes/8466915000) Other, For machines of heading 8464, Other. Duty (MFN): free

## In other countries

No other national tariff on border.bot has live lines under 8466.91 yet.

- [The Harmonized System text for 8466.91](https://border.bot/hs-codes/846691)

- Previous subheading: [8466.30](https://border.bot/countries/united-states/hs-codes/846630) Dividing heads and other special attachments for machines
- Next subheading: [8466.92](https://border.bot/countries/united-states/hs-codes/846692) For machines of heading 8465

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 8466.91?

The United States tariff splits HS 8466.91 (other: For machines of heading 84.64) into 2 national lines: 8466.91.10.00 (cast-iron parts not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery) and 8466.91.50.00 (other).

### What is the duty on HS 8466.91 in the United States?

Every United States line under 8466.91 is free of general (MFN) duty.

## 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/846691.json