5403.39.90 - Other

This HTS subheading, 5403.39.90, covers "Other" artificial filament yarn that is not sewing thread and not put up for retail sale. It specifically applies to artificial monofilament with a decitex of less than 67. The "Other" designation indicates that it encompasses yarns not specifically classified under preceding subheadings within 5403.39.

Within the "Other" category (5403.39), this subheading is distinguished from sibling 5403.39.10.00, which is specifically for "Textured yarn." This means that 5403.39.90 covers artificial filament yarns that are not textured.

The subcategories within 5403.39.90 further refine the classification based on the yarn's construction and twist. 5403.39.90.20 covers monofilament and multifilament yarns that are untwisted or have a twist of less than 5 turns per meter. In contrast, 5403.39.90.40 is for multifilament yarns with a twist of 5 turns or more per meter. This distinction in twist is a crucial factor for accurate classification.