5403.31.00.40 - Multifilament, with twist of 5 turns or more per meter (606)

This HTS category, 5403.31.00.40, specifically covers multifilament yarns made from viscose rayon. These yarns are characterized by having a twist of 5 turns or more per meter. It's important to note that this classification applies to yarns not intended for retail sale, and they must be composed of artificial filaments. The term "multifilament" indicates that the yarn is constructed from multiple continuous strands.

The defining characteristic that distinguishes this category from its sibling, 5403.31.00.20, is the degree of twist. While sibling 5403.31.00.20 includes monofilament yarns or multifilament yarns that are untwisted or have a twist of less than 5 turns per meter, this category is reserved for multifilament yarns with a twist of 5 turns per meter or more. This higher twist level can influence the yarn's strength, appearance, and suitability for different textile applications.

As this is a leaf node within the HTS classification system, there are no further subcategories under 5403.31.00.40. Therefore, the classification is finalized at this level, requiring careful examination of the yarn's material (viscose rayon), structure (multifilament), and specific twist measurement to ensure accurate import or export declaration.