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HTSUS, United States

5509.41.00.90

Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale / Single yarn / Other (604)

Classification path

  1. Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale
  2. Other yarn, containing 85 percent or more by weight of synthetic staple fibers
  3. Single yarn
  4. Other (604)

Rates of duty

General (MFN)
9%
Column 2Cuba, North Korea, Russia, Belarus
54%
Unit of quantity
kg

Trade agreement rates

FreeU.S.-Australia FTA, U.S.-Bahrain FTA, U.S.-Chile FTA, U.S.-Colombia TPA, U.S.-Israel FTA, U.S.-Jordan FTA, U.S.-Korea FTA, U.S.-Morocco FTA, U.S.-Oman FTA, CAFTA-DR, U.S.-Panama TPA, U.S.-Peru TPA, USMCA, U.S.-Singapore FTA

Related lines in heading 5509

About heading 5509

Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale

Heading 5509 covers yarn of synthetic staple fibers, other than sewing thread, that is not put up for retail sale. Lines are split first by fiber content, with 85% or more of one synthetic fiber in subheadings 5509.11 through 5509.42 and other yarn in 5509.51 through 5509.99. Within each group the break is single yarn versus multiple (folded) or cabled yarn, then by the fiber it is mixed with.

Full guide to heading 5509

Products in this heading

  • Single yarn of 100% polyester staple fibers for weaving
  • Multiple (folded) polyester staple yarn with a final Z twist
  • Single yarn of nylon or other polyamide staple fibers
  • Acrylic staple yarn, multiple (folded) or cabled, for sweaters
  • Polyester staple yarn mixed with cotton
  • Polyester staple yarn mixed with wool or fine animal hair
  • Single yarn of polyvinyl alcohol (PVA) staple fibers
  • Acrylic staple yarn mixed with artificial staple fibers

Frequently asked questions

What is the HTS code for multiple polyester staple yarn?

Multiple (folded) or cabled yarn of 85% or more polyester staple fibers is 5509.22.00.90, dutiable at 10.6% general (MFN). If it has a final Z twist, use 5509.22.00.10, also 10.6% general (MFN).

What is the duty on acrylic staple yarn?

Single yarn of 85% or more acrylic or modacrylic staple fibers is 5509.31.00.00 at 9% general (MFN). The multiple (folded) or cabled version is 5509.32.00.00 at 10% general (MFN).

How do I classify polyester staple yarn mixed with cotton?

Use 5509.53.00.30 if the yarn does not exceed 52 nm, or 5509.53.00.60 if it exceeds 52 nm. Both lines carry a 13.2% general (MFN) rate.

Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.

HTS 5509.41.00.90: Yarn (other than sewing thread) of synthetic staple fibers,..., 9% duty | HTSBase