# United States tariff lines under HS 8547.10

> The United States tariff splits HS 8547.10 (insulating fittings of ceramics) into 2 national lines: 8547.10.40.00 (ceramic insulators to be used in the production of spark plugs for natural gas-fueled, stationary, internal combustion engines) and 8547.10.80.00 (other). The general (MFN) duty is 3% on all 2 lines.

Source: https://border.bot/countries/united-states/hs-codes/854710
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 85](https://border.bot/countries/united-states/hs-codes/85) / [8547.10](https://border.bot/countries/united-states/hs-codes/854710)

## Key facts

- HS subheading: [8547.10](https://border.bot/hs-codes/854710)
- Duty (MFN): 3%
- National lines: 2
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 85: Electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles

## United States lines under 8547.10

The United States tariff splits HS 8547.10 (insulating fittings of ceramics) into 2 national lines: 8547.10.40.00 (ceramic insulators to be used in the production of spark plugs for natural gas-fueled, stationary, internal combustion engines) and 8547.10.80.00 (other).

The general (MFN) duty is 3% on all 2 lines.

- [8547.10.40.00](https://border.bot/countries/united-states/hs-codes/8547104000) Insulating fittings of ceramics, Ceramic insulators to be used in the production of spark plugs for natural gas-fueled, stationary, internal combustion engines. Duty (MFN): 3%
- [8547.10.80.00](https://border.bot/countries/united-states/hs-codes/8547108000) Insulating fittings of ceramics, Other. Duty (MFN): 3%

## In other countries

No other national tariff on border.bot has live lines under 8547.10 yet.

- [The Harmonized System text for 8547.10](https://border.bot/hs-codes/854710)

- Previous subheading: [8546.90](https://border.bot/countries/united-states/hs-codes/854690) Electrical insulators of any material
- Next subheading: [8547.20](https://border.bot/countries/united-states/hs-codes/854720) Insulating fittings for electrical machines, appliances or equipment, being fittings wholly of insulating material apart from any minor components of metal (for example, threaded sockets) incorporated during molding solely for the purposes of assembly, other than insulators of heading 8546; electrical conduit tubing and joints therefor, of base metal lined with insulating material

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 8547.10?

The United States tariff splits HS 8547.10 (insulating fittings of ceramics) into 2 national lines: 8547.10.40.00 (ceramic insulators to be used in the production of spark plugs for natural gas-fueled, stationary, internal combustion engines) and 8547.10.80.00 (other).

### What is the duty on HS 8547.10 in the United States?

The general (MFN) duty is 3% on all 2 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/854710.json