# HS code 5503.11: Synthetic staple fibres, not carded, combed or otherwise processed for spinning, of nylon or other polyamides, of aramids

> HS code 5503.11 covers synthetic staple fibres, not carded, combed or otherwise processed for spinning, of nylon or other polyamides, of aramids. It sits in heading 55.03 (synthetic staple fibres, not carded, combed or otherwise processed for spinning) in chapter 55 (man-made staple fibres). Other goods of heading 55.03 are classified under 5503.19 (of nylon or other polyamides, other), 5503.20 (of polyesters), 5503.30 (acrylic or modacrylic), 5503.40 (of polypropylene) or 1 other.

Source: https://staging.border.bot/hs-codes/550311
Last updated: 13 October 2026

[HS codes](https://staging.border.bot/hs-codes) / [Chapter 55](https://staging.border.bot/hs-codes/55) / [55.03](https://staging.border.bot/hs-codes/5503) / [5503.11](https://staging.border.bot/hs-codes/550311)

## Key facts

- HS code: 5503.11
- Covers: Synthetic staple fibres, not carded, combed or otherwise processed for spinning, of nylon or other polyamides, of aramids
- Heading: [55.03: Synthetic staple fibres, not carded, combed or otherwise processed for spinning](https://staging.border.bot/hs-codes/5503)
- Chapter: [55: Man-made staple fibres](https://staging.border.bot/hs-codes/55)
- Edition: HS2022
- Duty rates: [Set by each country’s tariff](https://staging.border.bot/countries)

## What this code covers

HS code 5503.11 covers synthetic staple fibres, not carded, combed or otherwise processed for spinning, of nylon or other polyamides, of aramids.

The legal text of the subheading is “Of nylon or other polyamides: Of aramids”, read under “Of nylon or other polyamides”, in HS2022.

## What it doesn’t cover

Other goods of heading 55.03 are classified under 5503.19 (of nylon or other polyamides, other), 5503.20 (of polyesters), 5503.30 (acrylic or modacrylic), 5503.40 (of polypropylene) or 1 other.

- [5503.19](https://staging.border.bot/hs-codes/550319) Of nylon or other polyamides: Other
- [5503.20](https://staging.border.bot/hs-codes/550320) Of polyesters
- [5503.30](https://staging.border.bot/hs-codes/550330) Acrylic or modacrylic
- [5503.40](https://staging.border.bot/hs-codes/550340) Of polypropylene
- [5503.90](https://staging.border.bot/hs-codes/550390) Other

## How it is structured

5503.11 is a six-digit subheading. Its first two digits, 55, are the chapter; the first four, 5503, are heading 55.03; the last two, 11, identify the subheading within the heading.

Countries add their own digits after these six for their national tariff lines.

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

## In other countries

No national tariff lines under 5503.11 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 5503.11 at six digits and add their own digits after it.

## Related codes

The same text, “Of nylon or other polyamides: Of aramids”, also divides 1 other heading in chapter 55: 5501.11 under heading 55.01.

- [5501.11](https://staging.border.bot/hs-codes/550111) Heading 55.01: Synthetic filament tow

- Previous subheading: [5502.90](https://staging.border.bot/hs-codes/550290) Other
- Next subheading: [5503.19](https://staging.border.bot/hs-codes/550319) Of nylon or other polyamides: Other

## Frequently asked questions

### What does HS code 5503.11 cover?

HS code 5503.11 covers synthetic staple fibres, not carded, combed or otherwise processed for spinning, of nylon or other polyamides, of aramids.

### Which heading and chapter is HS code 5503.11 in?

HS code 5503.11 is in heading 55.03 (synthetic staple fibres, not carded, combed or otherwise processed for spinning) in chapter 55 (man-made staple fibres).

### Where are goods of heading 55.03 classified when 5503.11 doesn’t fit?

Other goods of heading 55.03 are classified under 5503.19 (of nylon or other polyamides, other), 5503.20 (of polyesters), 5503.30 (acrylic or modacrylic), 5503.40 (of polypropylene) or 1 other.

## Sources and updates

The Harmonized System legal text comes from border.bot release 1 (edition HS 2022), imported from a file, and has been live since 13 October 2026.

This page was last updated on 13 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.

Machine-readable: https://staging.border.bot/hs-codes/550311.json