5510.90.60.00 - Other (607)

This HTS category, 5510.90.60.00, encompasses yarns of artificial staple fibers that are not put up for retail sale, excluding those predominantly or solely mixed with synthetic staple fibers. "Artificial staple fibers" refers to fibers derived from regenerated cellulose or other artificial materials, such as rayon or modal, cut into staple lengths. The key characteristic here is that these yarns are comprised of artificial staple fibers, and the "Other" designation signifies that they do not fall into specific, more narrowly defined categories within the broader heading for artificial staple fiber yarns not for retail sale. This implies a residual classification for artificial staple fiber yarns that do not meet the criteria for other specific subheadings.

This category serves as a residual classification for artificial staple fiber yarns. It is distinguished from its sibling category, "Mixed mainly or solely with synthetic staple fibers" (referencing 5510.90.00.xx, which would be the parent of the sibling), by the composition of the yarn. Whereas the sibling specifically addresses yarns where artificial staple fibers are mixed primarily with synthetic staple fibers, this category is for yarns that are exclusively artificial staple fiber or contain very minor proportions of other fibers not of a synthetic nature, and are not specifically classified elsewhere. The yarn is also not intended for direct sale to consumers, suggesting it is destined for further manufacturing processes.

As this is a leaf node within the HTS structure, there are no further subcategories. Therefore, the focus for classification under 5510.90.60.00 is on confirming that the yarn is indeed made from artificial staple fibers (not synthetic or natural), is not put up for retail sale, and does not meet the specific criteria of any other more detailed provision within heading 5510. Typical goods classified here would include single or multiple yarns of artificial staple fibers used in the production of fabrics, garments, or other textile articles where the artificial fiber content is predominant and not mixed in significant proportions with synthetic fibers.