# United States tariff line 5503.11.00.00: Of aramids

> In the United States tariff, line 5503.11.00.00 covers synthetic staple fibers, not carded, combed or otherwise processed for spinning, of nylon or other polyamides, of aramids. The general (MFN) duty rate is 4.3%. It falls under HS subheading 5503.11 in heading 55.03 (chapter 55).

Source: https://border.bot/countries/united-states/hs-codes/5503110000
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) / [5503.11](https://border.bot/countries/united-states/hs-codes/550311) / [5503.11.00.00](https://border.bot/countries/united-states/hs-codes/5503110000)

## Key facts

- Tariff line: 5503.11.00.00
- Covers: Synthetic staple fibers, not carded, combed or otherwise processed for spinning, of nylon or other polyamides, of aramids
- Duty (MFN): 4.3%
- Preferential rates: From free (14 programmes or origins)
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [5503.11](https://border.bot/hs-codes/550311)

## What this line covers

In the United States tariff, line 5503.11.00.00 covers synthetic staple fibers, not carded, combed or otherwise processed for spinning, of nylon or other polyamides, of aramids.

Its legal text is “Of aramids”, read under “Of nylon or other polyamides”.

## How it is structured

It falls under HS subheading 5503.11 in heading 55.03 (chapter 55). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 55: Man-made staple fibres
- Heading 55.03: Synthetic staple fibers, not carded, combed or otherwise processed for spinning
- Subheading 5503.11: Of nylon or other polyamides
- Line 5503.11.00.00: Of aramids

## Duty

The general (MFN) duty rate is 4.3%.

Duty-free entry applies to goods that qualify under 14 programmes.

- Free: United States-Australia Free Trade Agreement (AU)
- Free: United States-Bahrain Free Trade Agreement Implementation Act (BH)
- Free: United States-Chile Free Trade Agreement (CL)
- Free: United States-Colombia Trade Promotion Agreement Implementation Act (CO)
- Free: United States-Israel Free Trade Area (IL)
- Free: United States-Jordan Free Trade Area Implementation Act (JO)
- Free: United States-Korea Free Trade Agreement Implementation Act (KR)
- Free: United States-Morocco Free Trade Agreement Implementation Act (MA)
- Free: United States-Oman Free Trade Agreement Implementation Act (OM)
- Free: Dominican Republic-Central America-United States Free Trade Agreement (P)
- Free: United States-Panama Trade Promotion Agreement Implementation Act (PA)
- Free: United States-Peru Trade Promotion Agreement Implementation Act (PE)
- Free: United States-Mexico-Canada Agreement (S)
- Free: United States-Singapore Free Trade Agreement (SG)

## In other countries

No other national tariff on border.bot has live lines under 5503.11 yet.

- [The Harmonized System text for 5503.11](https://border.bot/hs-codes/550311)

- Previous line: [5502.90.00.00](https://border.bot/countries/united-states/hs-codes/5502900000) Other
- Next line: [5503.19.10.00](https://border.bot/countries/united-states/hs-codes/5503191000) Containing 10 percent or more by weight of nylon 12

## Frequently asked questions

### What does tariff line 5503.11.00.00 cover in the United States tariff?

In the United States tariff, line 5503.11.00.00 covers synthetic staple fibers, not carded, combed or otherwise processed for spinning, of nylon or other polyamides, of aramids.

### What is the general (MFN) duty on 5503.11.00.00 in the United States?

The general (MFN) duty rate is 4.3%.

### Which preferential rates apply to 5503.11.00.00?

Duty-free entry applies to goods that qualify under 14 programmes: the United States-Australia Free Trade Agreement, the United States-Bahrain Free Trade Agreement Implementation Act, the United States-Chile Free Trade Agreement, the United States-Colombia Trade Promotion Agreement Implementation Act, the United States-Israel Free Trade Area, the United States-Jordan Free Trade Area Implementation Act, the United States-Korea Free Trade Agreement Implementation Act, the United States-Morocco Free Trade Agreement Implementation Act, the United States-Oman Free Trade Agreement Implementation Act, the Dominican Republic-Central America-United States Free Trade Agreement, the United States-Panama Trade Promotion Agreement Implementation Act, the United States-Peru Trade Promotion Agreement Implementation Act, the United States-Mexico-Canada Agreement and the United States-Singapore Free Trade Agreement.

## 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/5503110000.json