# HS code 8547.90: 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 moulding solely for purposes of assembly, other than insulators of heading 85.46; electrical conduit tubing and joints therefor, of base metal lined with insulating material

> HS code 8547.90 covers 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 moulding solely for purposes of assembly, other than insulators of heading 85.46; electrical conduit tubing and joints therefor, of base metal lined with insulating material, other than those classified in 8547.10 and 8547.20. It sits in heading 85.47 (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 moulding solely for purposes of assembly, other than insulators of heading 85.46; electrical conduit tubing and joints therefor, of base metal lined with insulating material) in 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). Other goods of heading 85.47 are classified under 8547.10 (insulating fittings of ceramics) or 8547.20 (insulating fittings of plastics). National tariff lines under 8547.90 are live on border.bot for the United States (4 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/854790
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 85](https://border.bot/hs-codes/85) / [85.47](https://border.bot/hs-codes/8547) / [8547.90](https://border.bot/hs-codes/854790)

## Key facts

- HS code: 8547.90
- Covers: 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 moulding solely for purposes of assembly, other than insulators of heading 85.46; electrical conduit tubing and joints therefor, of base metal lined with insulating material
- Heading: [85.47: 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 moulding solely for purposes of assembly, other than insulators of heading 85.46; electrical conduit tubing and joints therefor, of base metal lined with insulating material](https://border.bot/hs-codes/8547)
- 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](https://border.bot/hs-codes/85)
- Edition: HS2022
- Duty in the United States: [See its 4 lines](https://border.bot/countries/united-states/hs-codes/854790)

## What this code covers

HS code 8547.90 covers 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 moulding solely for purposes of assembly, other than insulators of heading 85.46; electrical conduit tubing and joints therefor, of base metal lined with insulating material, other than those classified in 8547.10 and 8547.20.

The legal text of the subheading is “Other”, in HS2022.

## What it doesn’t cover

Other goods of heading 85.47 are classified under 8547.10 (insulating fittings of ceramics) or 8547.20 (insulating fittings of plastics).

- [8547.10](https://border.bot/hs-codes/854710) Insulating fittings of ceramics
- [8547.20](https://border.bot/hs-codes/854720) Insulating fittings of plastics

## How it is structured

8547.90 is a six-digit subheading. Its first two digits, 85, are the chapter; the first four, 8547, are heading 85.47; the last two, 90, identify the subheading within the heading.

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

- 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
- Heading 85.47: 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 moulding solely for purposes of assembly, other than insulators of heading 85.46; electrical conduit tubing and joints therefor, of base metal lined with insulating material
- Subheading 8547.90: Other

## In other countries

National tariff lines under 8547.90 are live on border.bot for the United States (4 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/854790): 4 lines, used by 1 other country

- Previous subheading: [8547.20](https://border.bot/hs-codes/854720) Insulating fittings of plastics
- Next subheading: [8548.00](https://border.bot/hs-codes/854800) Electrical parts of machinery or apparatus, not specified or included elsewhere in this Chapter

## Frequently asked questions

### What does HS code 8547.90 cover?

HS code 8547.90 covers 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 moulding solely for purposes of assembly, other than insulators of heading 85.46; electrical conduit tubing and joints therefor, of base metal lined with insulating material, other than those classified in 8547.10 and 8547.20.

### Which heading and chapter is HS code 8547.90 in?

HS code 8547.90 is in heading 85.47 (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 moulding solely for purposes of assembly, other than insulators of heading 85.46; electrical conduit tubing and joints therefor, of base metal lined with insulating material) in 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).

### Where are goods of heading 85.47 classified when 8547.90 doesn’t fit?

Other goods of heading 85.47 are classified under 8547.10 (insulating fittings of ceramics) or 8547.20 (insulating fittings of plastics).

### Which countries’ tariffs list national lines under HS code 8547.90?

National tariff lines under 8547.90 are live on border.bot for the United States (4 lines, also used by 1 other country).

## Sources and updates

The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.

This page was last updated on 11 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://border.bot/hs-codes/854790.json