# United States tariff lines under HS 5509.51

> The United States tariff splits HS 5509.51 (other yarn, of polyester staple fibres: Mixed mainly or solely with artificial staple fibres) into 2 national lines: 5509.51.30.00 (single yarn (607)) and 5509.51.60.00 (multiple (folded) or cabled yarn (607)). The general (MFN) duty differs by line: 9.7% on 5509.51.30.00 and 10.6% on 5509.51.60.00.

Source: https://border.bot/countries/united-states/hs-codes/550951
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) / [5509.51](https://border.bot/countries/united-states/hs-codes/550951)

## Key facts

- HS subheading: [5509.51](https://border.bot/hs-codes/550951)
- National lines: 2
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 55: Man-made staple fibres

## United States lines under 5509.51

The United States tariff splits HS 5509.51 (other yarn, of polyester staple fibres: Mixed mainly or solely with artificial staple fibres) into 2 national lines: 5509.51.30.00 (single yarn (607)) and 5509.51.60.00 (multiple (folded) or cabled yarn (607)).

The general (MFN) duty differs by line: 9.7% on 5509.51.30.00 and 10.6% on 5509.51.60.00.

- [5509.51.30.00](https://border.bot/countries/united-states/hs-codes/5509513000) Other yarn, of polyester staple fibers, Mixed mainly or solely with artificial staple fibers, Single yarn (607). Duty (MFN): 9.7%
- [5509.51.60.00](https://border.bot/countries/united-states/hs-codes/5509516000) Other yarn, of polyester staple fibers, Mixed mainly or solely with artificial staple fibers, Multiple (folded) or cabled yarn (607). Duty (MFN): 10.6%

## In other countries

No other national tariff on border.bot has live lines under 5509.51 yet.

- [The Harmonized System text for 5509.51](https://border.bot/hs-codes/550951)

- Previous subheading: [5509.42](https://border.bot/countries/united-states/hs-codes/550942) Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale
- Next subheading: [5509.52](https://border.bot/countries/united-states/hs-codes/550952) Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 5509.51?

The United States tariff splits HS 5509.51 (other yarn, of polyester staple fibres: Mixed mainly or solely with artificial staple fibres) into 2 national lines: 5509.51.30.00 (single yarn (607)) and 5509.51.60.00 (multiple (folded) or cabled yarn (607)).

### What is the duty on HS 5509.51 in the United States?

The general (MFN) duty differs by line: 9.7% on 5509.51.30.00 and 10.6% on 5509.51.60.00.

## 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/550951.json