# United States tariff line 8439.91.10.00: Bed plates, roll bars and other stock-treating parts

> In the United States tariff, line 8439.91.10.00 covers parts, of machinery for making pulp of fibrous cellulosic materials, bed plates, roll bars and other stock-treating parts. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 8439.91 in heading 84.39 (chapter 84).

Source: https://border.bot/countries/united-states/hs-codes/8439911000
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) / [8439.91.10.00](https://border.bot/countries/united-states/hs-codes/8439911000)

## Key facts

- Tariff line: 8439.91.10.00
- Covers: Parts, of machinery for making pulp of fibrous cellulosic materials, bed plates, roll bars and other stock-treating parts
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [8439.91](https://border.bot/hs-codes/843991)

## What this line covers

In the United States tariff, line 8439.91.10.00 covers parts, of machinery for making pulp of fibrous cellulosic materials, bed plates, roll bars and other stock-treating parts.

Its legal text is “Bed plates, roll bars and other stock-treating parts”, read under “Parts” and “Of machinery for making pulp of fibrous cellulosic materials”.

## How it is structured

It falls under HS subheading 8439.91 in heading 84.39 (chapter 84). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
- Heading 84.39: 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
- Subheading 8439.91: Parts
- Within the subheading: Of machinery for making pulp of fibrous cellulosic materials
- Line 8439.91.10.00: Bed plates, roll bars and other stock-treating parts

## Duty

Goods under this line enter free of general (MFN) duty.

## 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)

## Other lines under 8439.91

- [8439.91.90.00](https://border.bot/countries/united-states/hs-codes/8439919000) Other

- Previous line: [8439.30.00.00](https://border.bot/countries/united-states/hs-codes/8439300000) Machinery for finishing paper or paperboard
- Next line: [8439.91.90.00](https://border.bot/countries/united-states/hs-codes/8439919000) Other

## Frequently asked questions

### What does tariff line 8439.91.10.00 cover in the United States tariff?

In the United States tariff, line 8439.91.10.00 covers parts, of machinery for making pulp of fibrous cellulosic materials, bed plates, roll bars and other stock-treating parts.

### What is the general (MFN) duty on 8439.91.10.00 in the United States?

Goods under this line enter 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/8439911000.json