5510.11.00.00 - Single yarn (603)

This HTS classification, 5510.11.00.00, specifically covers single yarns spun from artificial staple fibers, provided these yarns are not prepared for retail sale. The defining characteristic is that the yarn consists of 85 percent or more by weight of artificial staple fibers. This category encompasses yarns that have undergone a spinning process to form a single strand, as opposed to being twisted together to form a thicker or more complex structure. Examples include single spun yarns intended for further industrial processing into fabrics or other textile articles.

This category is distinguished from its sibling, 5510.12.00.00, which covers multiple (folded) or cabled yarns. While both categories fall under yarns of artificial staple fibers containing 85 percent or more by weight of such fibers and not put up for retail sale, the crucial difference lies in the construction of the yarn. Single yarn refers to a yarn composed of a single strand of fibers, whereas multiple or cabled yarn is made by twisting together two or more single yarns.

As this is a leaf node within the HTS structure, there are no further subcategories to explore under 5510.11.00.00. Classification at this level is determined by the material composition (85% or more artificial staple fibers), the construction of the yarn (single strand), and its presentation (not for retail sale). Therefore, importers and exporters should carefully verify the yarn's construction and fiber content to ensure accurate classification under this specific heading.