5402.45.90 - Other

This HTS category, 5402.45.90, encompasses "Other" synthetic filament yarn, specifically nylon or other polyamide monofilament, or multifilament with a twist not exceeding 50 turns per meter. This broad classification covers a variety of nylon and polyamide filament yarns that do not fit into more specific subcategories within the 5402.45 grouping. The key criteria for inclusion are the material (nylon or other polyamide), the form (filament), and the twist level (untwisted or up to 50 turns per meter).

The distinction from its sibling category, 5402.45.10.00, lies in the specific characteristics and intended use. The sibling category is narrowly defined for colored multifilament yarn meeting strict criteria regarding decitex, twist, and certified use in doll wig manufacturing. In contrast, 5402.45.90.00 is a more general classification for nylon/polyamide filament yarns that do not meet these specialized requirements, covering a wider range of applications and specifications.

Within this category, two primary subcategories exist to further refine the classification based on the yarn's construction and twist. The first subcategory addresses monofilament yarns, as well as multifilament yarns that are either untwisted or possess a twist of less than 5 turns per meter. The second subcategory, 5402.45.90.40, specifically covers multifilament yarns that have a twist of 5 turns or more per meter, providing a clear distinction based on the degree of twisting applied to the filaments. This subdivision allows for more precise tariff application based on the physical properties of the yarn.