5509.11.00.00 - Single yarn (604) 🖩

This HTS classification, 5509.11.00.00, specifically covers single yarns made from synthetic staple fibers, provided they are not prepared for retail sale. The key defining characteristic of this category is that the yarn must contain 85 percent or more by weight of staple fibers of nylon or other polyamides. This includes yarns spun from short, discontinuous filaments of these synthetic materials, which are then twisted together to form a continuous strand.

Distinction from sibling categories is crucial for accurate classification. The sole sibling at this level, 5509.12.00.00, covers multiple (folded) or cabled yarns. Therefore, the primary difference lies in the construction of the yarn; this category is for single strands, whereas the sibling is for yarns that have been formed by twisting two or more single yarns together. This structural difference impacts the yarn's strength and end-use applications.

As this is a leaf node in the HTS structure, there are no further subcategories. Classification at this level relies entirely on the material composition (85% or more nylon or other polyamide staple fibers) and the yarn construction (single yarn, not put up for retail sale). Examples of goods falling under this classification would include industrial sewing yarn, yarns for manufacturing textiles, or yarns used in technical applications, provided they meet the stated weight and construction criteria.