# United States tariff lines under HS 8475.21

> The United States tariff splits HS 8475.21 (machines for manufacturing or hot working glass or glassware: Machines for making optical fibres and preforms thereof) into 1 national line: 8475.21.00.00 (machines for making optical fibers and preforms thereof). Every United States line under 8475.21 is free of general (MFN) duty.

Source: https://border.bot/countries/united-states/hs-codes/847521
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 84](https://border.bot/countries/united-states/hs-codes/84) / [8475.21](https://border.bot/countries/united-states/hs-codes/847521)

## Key facts

- HS subheading: [8475.21](https://border.bot/hs-codes/847521)
- Duty (MFN): Free
- National lines: 1
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof

## United States lines under 8475.21

The United States tariff splits HS 8475.21 (machines for manufacturing or hot working glass or glassware: Machines for making optical fibres and preforms thereof) into 1 national line: 8475.21.00.00 (machines for making optical fibers and preforms thereof).

Every United States line under 8475.21 is free of general (MFN) duty.

- [8475.21.00.00](https://border.bot/countries/united-states/hs-codes/8475210000) Machines for manufacturing or hot working glass or glassware, Machines for making optical fibers and preforms thereof. Duty (MFN): free

## In other countries

No other national tariff on border.bot has live lines under 8475.21 yet.

- [The Harmonized System text for 8475.21](https://border.bot/hs-codes/847521)

- Previous subheading: [8475.10](https://border.bot/countries/united-states/hs-codes/847510) Machines for assembling electric or electronic lamps, tubes or flashbulbs, in glass envelopes; machines for manufacturing or hot working glass or glassware; parts thereof
- Next subheading: [8475.29](https://border.bot/countries/united-states/hs-codes/847529) Machines for assembling electric or electronic lamps, tubes or flashbulbs, in glass envelopes; machines for manufacturing or hot working glass or glassware; parts thereof

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 8475.21?

The United States tariff splits HS 8475.21 (machines for manufacturing or hot working glass or glassware: Machines for making optical fibres and preforms thereof) into 1 national line: 8475.21.00.00 (machines for making optical fibers and preforms thereof).

### What is the duty on HS 8475.21 in the United States?

Every United States line under 8475.21 is free of general (MFN) duty.

## 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/847521.json