Parts suitable for use solely or principally with the — HTS 8409
Parts suitable for use solely or principally with the engines of heading 8407 or 8408
Chapter 84 › Heading 8409
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS heading 8409 is a four-digit category for parts that are suitable for use solely or principally with internal-combustion piston engines classified in heading 8407 or 8408. In plain language, it covers qualifying parts made for certain spark-ignition or compression-ignition engines, rather than complete engines themselves. The wording “solely or principally” focuses on the part’s design, function, and normal use—not merely the seller’s description.
To reach a specific eight-digit HTSUS code, first determine which engine type the part is designed for and then follow the applicable subheading structure. The lower-level provisions may distinguish the part by type, construction, material, or other technical characteristics. Read the complete eight-digit description and its legal notes; do not choose a code based only on a product name or the first apparent match.
What to check
- Identify the engine type and confirm that it falls in heading 8407 or 8408.
- Describe the part’s exact function, construction, and material using engineering or manufacturer documentation.
- Compare the product with every relevant eight-digit description and any applicable section or chapter notes.
- Check whether the item is a complete machine, an accessory, or a part of general use that may belong elsewhere.
- Confirm the classification with binding tariff information, official customs guidance, or a qualified customs broker when the wording or intended use is unclear.
HTS heading 8409 summary
Parts suitable for use solely or principally with the is a 4-digit product category containing 1 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Product codes & duty rates
👇 Each row is a specific product code — click a blue code to open its full page with exact duty rates by country, the rate-history chart, and a duty calculator. 👉
| Code | Description | General (MFN) | Special | Column 2 |
|---|---|---|---|---|
| 8409.10.00 👉 | For aircraft engines | Free | — | 35% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 8409?
Parts suitable for use solely or principally with the engines of heading 8407 or 8408. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.