# United States tariff lines under HS 6303.99

> The United States tariff splits HS 6303.99 (other: Of other textile materials) into 3 national lines: 6303.99.00.10 (of artificial fibers (666)), 6303.99.00.30 (containing 85 percent or more by weight of silk or silk waste) and 6303.99.00.60 (other (899)). The general (MFN) duty is 11.3% on all 3 lines.

Source: https://border.bot/countries/united-states/hs-codes/630399
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 63](https://border.bot/countries/united-states/hs-codes/63) / [6303.99](https://border.bot/countries/united-states/hs-codes/630399)

## Key facts

- HS subheading: [6303.99](https://border.bot/hs-codes/630399)
- Duty (MFN): 11.3%
- National lines: 3
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 63: Other made up textile articles; sets; worn clothing and worn textile articles; rags

## United States lines under 6303.99

The United States tariff splits HS 6303.99 (other: Of other textile materials) into 3 national lines: 6303.99.00.10 (of artificial fibers (666)), 6303.99.00.30 (containing 85 percent or more by weight of silk or silk waste) and 6303.99.00.60 (other (899)).

The general (MFN) duty is 11.3% on all 3 lines.

- [6303.99.00.10](https://border.bot/countries/united-states/hs-codes/6303990010) Other, Of other textile materials, Of artificial fibers (666). Duty (MFN): 11.3%
- [6303.99.00.30](https://border.bot/countries/united-states/hs-codes/6303990030) Other, Of other textile materials, Other, Containing 85 percent or more by weight of silk or silk waste. Duty (MFN): 11.3%
- [6303.99.00.60](https://border.bot/countries/united-states/hs-codes/6303990060) Other, Of other textile materials, Other, Other (899). Duty (MFN): 11.3%

## In other countries

No other national tariff on border.bot has live lines under 6303.99 yet.

- [The Harmonized System text for 6303.99](https://border.bot/hs-codes/630399)

- Previous subheading: [6303.92](https://border.bot/countries/united-states/hs-codes/630392) Of synthetic fibers
- Next subheading: [6304.11](https://border.bot/countries/united-states/hs-codes/630411) Knitted or crocheted

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 6303.99?

The United States tariff splits HS 6303.99 (other: Of other textile materials) into 3 national lines: 6303.99.00.10 (of artificial fibers (666)), 6303.99.00.30 (containing 85 percent or more by weight of silk or silk waste) and 6303.99.00.60 (other (899)).

### What is the duty on HS 6303.99 in the United States?

The general (MFN) duty is 11.3% on all 3 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/630399.json