5604.90.20.00 - High tenacity yarn of polyesters, of nylon or other polyamides or of viscose rayon, impregnated or coated (201)

This HTS subheading, 5604.90.20.00, specifically covers high-tenacity yarns made from polyesters, nylon, other polyamides, or viscose rayon that have undergone a process of impregnation or coating. The "high tenacity" aspect signifies that these yarns possess superior tensile strength, making them suitable for demanding applications. The impregnation or coating further enhances their properties, potentially offering improved abrasion resistance, chemical resistance, or adhesion, depending on the specific treatment applied.

In contrast to its sibling category, 5604.90.90.00 (Other), which encompasses any remaining impregnated or coated yarns not meeting the specific material criteria of this subheading, 5604.90.20.00 is narrowly defined by the exact types of synthetic or regenerated cellulosic fibers used. This distinction is crucial for accurate classification, as yarns made from other materials, even if impregnated or coated, would fall under the "Other" category.

As this is a leaf node within the HTS, there are no further subcategories under 5604.90.20.00. Therefore, the focus for classification professionals lies in confirming the material composition (polyester, nylon/polyamide, or viscose rayon) and verifying the high-tenacity characteristic, alongside the presence of impregnation or coating, to correctly assign goods to this specific tariff line. Examples might include tire cord fabric yarns or industrial sewing threads where exceptional strength and durability are paramount.