5403 - Artificial filament yarn (other than sewing thread), not put up for retail sale, including artificial monofilament of less than 67 decitex:

This HTS category, 5403, encompasses artificial filament yarn specifically when it is not intended for retail sale. This includes yarn manufactured from man-made materials, excluding sewing thread. A key defining characteristic for inclusion is that if it is in the form of monofilament, its decitex must be less than 67. This classification sits within Section XI, "Textile and Textile Articles," and specifically Chapter 54, which deals with man-made filaments.

Distinguishing this category from its siblings at the HTS database root level is straightforward. Category 5403 pertains exclusively to artificial filament yarn, whereas its numerous siblings, such as those found in Chapter 01, cover live animals. The scope of Chapter 54 is broad, focusing on various forms of man-made filaments, but 5403 hones in on a specific type of yarn based on its material origin (artificial), its presentation (not for retail sale), and its filament characteristics (decitex for monofilaments).

Within category 5403, further subdivisions exist to refine classification based on the yarn's structure and specific material. Subcategory 5403.10 distinguishes high tenacity yarn made from viscose rayon. The remaining descriptions within 5403 indicate further breakdown into "Other yarn, single" and "Other yarn, multiple (folded) or cabled." These subcategories allow for precise classification based on whether the yarn consists of a single strand or multiple strands twisted together, ensuring accurate tariff application for a wide array of artificial filament yarns.