# United States tariff lines under HS 8439.91

> The United States tariff splits HS 8439.91 (parts: Of machinery for making pulp of fibrous cellulosic material) into 2 national lines: 8439.91.10.00 (bed plates, roll bars and other stock-treating parts) and 8439.91.90.00 (other). Every United States line under 8439.91 is free of general (MFN) duty.

Source: https://border.bot/countries/united-states/hs-codes/843991
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) / [8439.91](https://border.bot/countries/united-states/hs-codes/843991)

## Key facts

- HS subheading: [8439.91](https://border.bot/hs-codes/843991)
- 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 8439.91

The United States tariff splits HS 8439.91 (parts: Of machinery for making pulp of fibrous cellulosic material) into 2 national lines: 8439.91.10.00 (bed plates, roll bars and other stock-treating parts) and 8439.91.90.00 (other).

Every United States line under 8439.91 is free of general (MFN) duty.

- [8439.91.10.00](https://border.bot/countries/united-states/hs-codes/8439911000) Parts, Of machinery for making pulp of fibrous cellulosic materials, Bed plates, roll bars and other stock-treating parts. Duty (MFN): free
- [8439.91.90.00](https://border.bot/countries/united-states/hs-codes/8439919000) Parts, Of machinery for making pulp of fibrous cellulosic materials, Other. Duty (MFN): free

## In other countries

No other national tariff on border.bot has live lines under 8439.91 yet.

- [The Harmonized System text for 8439.91](https://border.bot/hs-codes/843991)

- Previous subheading: [8439.30](https://border.bot/countries/united-states/hs-codes/843930) Machinery for making pulp of fibrous cellulosic material or for making or finishing paper or paperboard (other than the machinery of heading 8419); parts thereof
- Next subheading: [8439.99](https://border.bot/countries/united-states/hs-codes/843999) Other

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 8439.91?

The United States tariff splits HS 8439.91 (parts: Of machinery for making pulp of fibrous cellulosic material) into 2 national lines: 8439.91.10.00 (bed plates, roll bars and other stock-treating parts) and 8439.91.90.00 (other).

### What is the duty on HS 8439.91 in the United States?

Every United States line under 8439.91 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/843991.json