Polyamides in primary forms — HTS 3908
Polyamides in primary forms
Chapter 39 › Heading 3908
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 3908 is a four-digit product category for polyamides in primary forms. Polyamides are polymers commonly known as nylon or polyamide resins. “Primary forms” generally means the polymer material itself, such as resin supplied in pellets, granules, powder, flakes, or similar bulk forms—not a finished item made from that material.
To reach the correct eight-digit HTSUS code, start with heading 3908 and then follow the applicable subheading structure. The code commonly narrows by the polyamide’s chemical type or material designation, such as a particular nylon family or other specified polyamide, and may then distinguish additional product descriptions. The product’s exact composition, physical form, and any relevant chemical characteristics must match the wording of the chosen code.
What to check
- Confirm that the shipment is polyamide resin in a primary form, rather than a finished plastic article, fiber, film, or component classified elsewhere.
- Review the supplier’s technical data sheet, safety data sheet, and certificate of analysis for the polymer name, nylon or polyamide designation, monomer composition, and mixture details.
- Match the product’s chemical type to the subheading language; do not rely only on a trade name such as “nylon.”
- Check whether additives, blends, recycled content, or other materials affect the product description or classification.
- Verify the complete eight-digit HTSUS code against the current official tariff and obtain customs-broker or binding-ruling guidance when the composition or subheading choice is uncertain.
HTS heading 3908 summary
Polyamides in primary forms 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.
Sub-categories
| Code | Description |
|---|---|
| 3908.90 | Other |
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 |
|---|---|---|---|---|
| 3908.10.00.00 👉 | Polyamide-6, -11, -12, -6,6, -6,9, -6,10 or -6,12 | 6.3% | Free | 15.4¢/kg + 51.5% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 3908?
Polyamides in primary forms. 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.