5509.41.00.90 - Other (604)

This HTS category, 5509.41.00.90, encompasses single yarns composed of 85% or more synthetic staple fibers, not intended for retail sale. The "Other (604)" designation signifies that these yarns do not fall into more specific subcategories within this group. This broad classification applies to a variety of synthetic staple fiber yarns, such as those made from polyester, nylon, acrylic, or other synthetic materials, provided they meet the weight percentage requirement and are not put up for retail display.

This category is distinguished from its sibling, 5509.41.00.10, which specifically covers single yarns of polyvinyl alcohol (PVA) fibers. Therefore, if a single yarn is composed of 85% or more of synthetic staple fibers but is not PVA, it would likely be classified under this "Other" designation. The key differentiator is the specific type of synthetic fiber used.

As a leaf node within the HTS structure, this category does not have further subcategories. Classification into this code relies on confirming the yarn is a single yarn, made from synthetic staple fibers accounting for at least 85% of its weight, and is not packaged for direct consumer purchase. Examples could include industrial yarns used in manufacturing textiles, rope, or other textile articles where the yarn is an intermediate product.