Parts suitable for use solely or principally with the — HTS 8431
Parts suitable for use solely or principally with the machinery of headings 8425 to 8430
Chapter 84 › Heading 8431
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 8431 is a parts category for components designed for use solely or principally with machinery classified in headings 8425 through 8430. Those headings cover certain lifting, handling, loading, excavating, grading, drilling, and related machinery. Examples can include identifiable parts for equipment such as hoists, cranes, forklifts, earthmoving machines, and other machinery in that range—but the part must be connected to the covered machinery, not merely usable with it in a general way.
The 4-digit heading is only the starting point. To reach the correct 8-digit HTSUS subheading, first identify the machine the part fits and confirm that machine belongs in headings 8425–8430. Then follow the heading’s breakdown, which commonly separates parts by the parent machinery or by the part’s type, material, or construction. Review the full legal text, section and chapter notes, and any applicable exclusions; a customs broker may be needed when the part’s principal use or classification is uncertain.
What to check
- Identify the complete machine the part is designed for, including its function and model or equipment family, and verify that machine is classified in heading 8425, 8426, 8427, 8428, 8429, or 8430.
- Check whether the item is an identifiable machine part rather than a general-purpose article such as a standard bearing, fastener, electrical component, or hydraulic item that may be classified elsewhere.
- Use the product’s construction and material—such as metal, rubber, or another specified material—only after confirming that the relevant 8431 subheading uses that distinction.
- Compare the manufacturer’s drawings, part number, catalog description, and intended use with the exact 8-digit wording; do not choose a code based only on a trade name.
- Confirm the current HTSUS text, chapter and section notes, and any binding ruling or broker advice relevant to the product before filing.
HTS heading 8431 summary
Parts suitable for use solely or principally with the is a 4-digit product category containing 2 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 |
|---|---|---|---|---|
| 8431.10.00 👉 | Of machinery of heading 8425 | Free | — | 35% |
| 8431.20.00.00 👉 | Of machinery of heading 8427 | 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 8431?
Parts suitable for use solely or principally with the machinery of headings 8425 to 8430. 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.