# United States tariff line 8504.90.96.38: Stacked cores for incorporation into transformers

> In the United States tariff, line 8504.90.96.38 covers parts, other parts, of transformers, stacked cores for incorporation into transformers. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 8504.90 in heading 85.04 (chapter 85).

Source: https://border.bot/countries/united-states/hs-codes/8504909638
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) / [8504.90](https://border.bot/countries/united-states/hs-codes/850490) / [8504.90.96.38](https://border.bot/countries/united-states/hs-codes/8504909638)

## Key facts

- Tariff line: 8504.90.96.38
- Covers: Parts, other parts, of transformers, stacked cores for incorporation into transformers
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [8504.90](https://border.bot/hs-codes/850490)

## What this line covers

In the United States tariff, line 8504.90.96.38 covers parts, other parts, of transformers, stacked cores for incorporation into transformers.

Its legal text is “Stacked cores for incorporation into transformers”, read under “Parts”, “Other”, “Other”, “Other parts” and “Of transformers”.

## How it is structured

It falls under HS subheading 8504.90 in heading 85.04 (chapter 85). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- 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 85.04: Electrical transformers, static converters (for example, rectifiers) and inductors; parts thereof
- Subheading 8504.90: Parts
- Within the subheading: Other
- Within the subheading: Other
- Within the subheading: Other parts
- Within the subheading: Of transformers
- Line 8504.90.96.38: Stacked cores for incorporation into transformers

## Duty

Goods under this line enter free of general (MFN) duty.

The rate is published on 8504.90.96.

## In other countries

No other national tariff on border.bot has live lines under 8504.90 yet.

- [The Harmonized System text for 8504.90](https://border.bot/hs-codes/850490)

## Other lines under 8504.90

- [8504.90.20.00](https://border.bot/countries/united-states/hs-codes/8504902000) Printed circuit assemblies
- [8504.90.41.00](https://border.bot/countries/united-states/hs-codes/8504904100) Other
- [8504.90.65.00](https://border.bot/countries/united-states/hs-codes/8504906500) Of the goods of subheading 8504.40 or 8504.50 for telecommunication apparatus
- [8504.90.75.00](https://border.bot/countries/united-states/hs-codes/8504907500) Other
- [8504.90.96.10](https://border.bot/countries/united-states/hs-codes/8504909610) For transformers
- [8504.90.96.30](https://border.bot/countries/united-states/hs-codes/8504909630) Other
- [8504.90.96.34](https://border.bot/countries/united-states/hs-codes/8504909634) Laminations for incorporation into stacked cores
- [8504.90.96.42](https://border.bot/countries/united-states/hs-codes/8504909642) Wound cores for incorporation into transformers
- [8504.90.96.46](https://border.bot/countries/united-states/hs-codes/8504909646) Other
- [8504.90.96.50](https://border.bot/countries/united-states/hs-codes/8504909650) Of static converters
- [8504.90.96.90](https://border.bot/countries/united-states/hs-codes/8504909690) Other

- Previous line: [8504.90.96.34](https://border.bot/countries/united-states/hs-codes/8504909634) Laminations for incorporation into stacked cores
- Next line: [8504.90.96.42](https://border.bot/countries/united-states/hs-codes/8504909642) Wound cores for incorporation into transformers

## Frequently asked questions

### What does tariff line 8504.90.96.38 cover in the United States tariff?

In the United States tariff, line 8504.90.96.38 covers parts, other parts, of transformers, stacked cores for incorporation into transformers.

### What is the general (MFN) duty on 8504.90.96.38 in the United States?

Goods under this line enter free of general (MFN) duty. The rate is published on 8504.90.96.

## 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/8504909638.json