# United States tariff lines under HS 5509.42

> The United States tariff splits HS 5509.42 (other yarn, containing 85 % or more by weight of synthetic staple fibres: Multiple (folded) or cabled yarn) into 2 national lines: 5509.42.00.10 (of polyvinyl alcohol (PVA) fibers (604)) and 5509.42.00.90 (other (604)). The general (MFN) duty is 7% on all 2 lines.

Source: https://border.bot/countries/united-states/hs-codes/550942
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 55](https://border.bot/countries/united-states/hs-codes/55) / [5509.42](https://border.bot/countries/united-states/hs-codes/550942)

## Key facts

- HS subheading: [5509.42](https://border.bot/hs-codes/550942)
- Duty (MFN): 7%
- National lines: 2
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 55: Man-made staple fibres

## United States lines under 5509.42

The United States tariff splits HS 5509.42 (other yarn, containing 85 % or more by weight of synthetic staple fibres: Multiple (folded) or cabled yarn) into 2 national lines: 5509.42.00.10 (of polyvinyl alcohol (PVA) fibers (604)) and 5509.42.00.90 (other (604)).

The general (MFN) duty is 7% on all 2 lines.

- [5509.42.00.10](https://border.bot/countries/united-states/hs-codes/5509420010) Other yarn, containing 85 percent or more by weight of synthetic staple fibers, Multiple (folded) or cabled yarn, Of polyvinyl alcohol (PVA) fibers (604). Duty (MFN): 7%
- [5509.42.00.90](https://border.bot/countries/united-states/hs-codes/5509420090) Other yarn, containing 85 percent or more by weight of synthetic staple fibers, Multiple (folded) or cabled yarn, Other (604). Duty (MFN): 7%

## In other countries

No other national tariff on border.bot has live lines under 5509.42 yet.

- [The Harmonized System text for 5509.42](https://border.bot/hs-codes/550942)

- Previous subheading: [5509.41](https://border.bot/countries/united-states/hs-codes/550941) Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale
- Next subheading: [5509.51](https://border.bot/countries/united-states/hs-codes/550951) Mixed mainly or solely with artificial staple fibers

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 5509.42?

The United States tariff splits HS 5509.42 (other yarn, containing 85 % or more by weight of synthetic staple fibres: Multiple (folded) or cabled yarn) into 2 national lines: 5509.42.00.10 (of polyvinyl alcohol (PVA) fibers (604)) and 5509.42.00.90 (other (604)).

### What is the duty on HS 5509.42 in the United States?

The general (MFN) duty is 7% on all 2 lines.

## 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/550942.json