HS Heading 5509 : Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale
HEADING DEFINITION & DISAMBIGUATION
HS Heading 5509 encompasses yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale. It classifies 18 6-digit WCO subheadings within Chapter 55 under the Harmonized System [USITC HTS 2026].
Subheadings Under Heading 5509
| HS Code | WCO 6-Digit Subheading Description | Chapter | Operational Package |
|---|---|---|---|
| 5509.11 | Containing 85 percent or more by weight of staple fibers of nylon or other polyamides, Single yarn (604) | 55 | View 5509.11 Package → |
| 5509.12 | Containing 85 percent or more by weight of staple fibers of nylon or other polyamides, Multiple (folded) or cabled yarn (604) | 55 | View 5509.12 Package → |
| 5509.21 | Containing 85 percent or more by weight of polyester staple fibers, Single yarn (604) | 55 | View 5509.21 Package → |
| 5509.22 | Containing 85 percent or more by weight of polyester staple fibers, Multiple (folded) or cabled yarn | 55 | View 5509.22 Package → |
| 5509.31 | Containing 85 percent or more by weight of acrylic or modacrylic staple fibers, Single yarn (604) | 55 | View 5509.31 Package → |
| 5509.32 | Containing 85 percent or more by weight of acrylic or modacrylic staple fibers, Multiple (folded) or cabled yarn (604) | 55 | View 5509.32 Package → |
| 5509.41 | Other yarn, containing 85 percent or more by weight of synthetic staple fibers, Single yarn | 55 | View 5509.41 Package → |
| 5509.42 | Other yarn, containing 85 percent or more by weight of synthetic staple fibers, Multiple (folded) or cabled yarn | 55 | View 5509.42 Package → |
| 5509.51 | Other yarn, of polyester staple fibers, Mixed mainly or solely with artificial staple fibers | 55 | View 5509.51 Package → |
| 5509.52 | Other yarn, of polyester staple fibers, Mixed mainly or solely with wool or fine animal hair (607) | 55 | View 5509.52 Package → |
| 5509.53 | Other yarn, of polyester staple fibers, Mixed mainly or solely with cotton | 55 | View 5509.53 Package → |
| 5509.59 | Other yarn, of polyester staple fibers, Other (607) | 55 | View 5509.59 Package → |
| 5509.61 | Other yarn, of acrylic or modacrylic staple fibers, Mixed mainly or solely with wool or fine animal hair (607) | 55 | View 5509.61 Package → |
| 5509.62 | Other yarn, of acrylic or modacrylic staple fibers, Mixed mainly or solely with cotton (607) | 55 | View 5509.62 Package → |
| 5509.69 | Other yarn, of acrylic or modacrylic staple fibers, Other | 55 | View 5509.69 Package → |
| 5509.91 | Other yarn, Mixed mainly or solely with wool or fine animal hair (607) | 55 | View 5509.91 Package → |
| 5509.92 | Other yarn, Mixed mainly or solely with cotton (607) | 55 | View 5509.92 Package → |
| 5509.99 | Other yarn, Other | 55 | View 5509.99 Package → |
DISAMBIGUATION & CLASSIFICATION GUIDE
How to Select the Correct Subheading Under Heading 5509
Commercial shipments must be declared under the exact 6-digit WCO subheading that matches physical, chemical, or processing characteristics. Review the subheading descriptions above and verify against binding CBP CROSS rulings prior to entry filing.
Official Primary Sources & Authority References
USITC HTS Heading 5509 ↗
United States International Trade Commission official Harmonized Tariff Schedule.
CBP CROSS Rulings ↗
CBP e-Rulings database for Heading 5509 precedent rulings.
WCO Nomenclature ↗
World Customs Organization Harmonized System 2022 nomenclature standard.
U.S. Census Foreign Trade ↗
U.S. Census Bureau HTS-to-NAICS concordance and Schedule B export database.
Heading 5509 Frequently Asked Questions (FAQ)
What commercial articles are grouped under HS Heading 5509?
HS Heading 5509 covers Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale, grouping 18 6-digit WCO subheadings.
How are 6-digit subheadings structured under Heading 5509?
Subheadings under Heading 5509 range from 5509.11 to 5509.90, classifying goods by processing state, origin, or material composition.
What is the representative US import duty rate for Heading 5509?
US MFN general duty rates for Heading 5509 commodities range from Duty-Free up to representative ad valorem percentages under the 2026 US HTS.
Are Section 301 tariffs applicable to goods under Heading 5509?
Section 301 additional tariffs depend on the specific 8-digit or 10-digit US HTS code and country of origin (e.g. China Lists 1–4A).
What PGA message set flags apply to Heading 5509?
Partner Government Agency flags (FDA, USDA APHIS, EPA) apply depending on the specific commodity sub-classification.
How do I distinguish between subheadings under Heading 5509?
Review WCO subheading terms and candidate descriptions. For example, unroasted vs. roasted or decaffeinated vs. non-decaffeinated.
Can goods under Heading 5509 enter duty-free under USMCA?
Yes. Goods originating in USMCA territories (US, Mexico, Canada) enter duty-free under SPI code P with a valid Certificate of Origin.
What is the Section 321 de minimis limit for Heading 5509?
Eligible import shipments valued at $800 USD or less imported by one person on one day enter duty-free under 19 U.S.C. 1321.
What documents are required for formal customs entry of Heading 5509?
Commercial Invoice, Packing List, Bill of Lading, and CBP Form 7501 are mandatory for entries exceeding $2,500 USD.
How can an importer get a binding CBP classification ruling for Heading 5509?
Importers may apply for a binding ruling via CBP National Commodity Specialist Division under 19 CFR Part 177.