5402.20.30.10 - Monofilament; multifilament, untwisted or with twist of less than 5 turns per meter

This HTS classification, 5402.20.30.10, specifically designates high tenacity polyester single yarn that is not textured and has a twist of less than 5 turns per meter. The defining characteristic here is the "single yarn" aspect, meaning it is composed of a single strand or ply. These yarns are engineered for exceptional strength relative to their weight and are intended for industrial applications where durability and tensile strength are paramount, such as in the manufacturing of ropes, nets, or reinforcement materials.

This category is distinguished from its sibling, 5402.20.30.30, by the level of twist. While both are high tenacity polyester single yarns, this classification applies only to those with a twist of fewer than 5 turns per meter. The sibling category encompasses yarns with a twist of 5 turns or more per meter, indicating a greater degree of ply consolidation and potentially altered yarn properties due to the increased twisting.

As this is a leaf node within the HTS, there are no further subdivisions. Classification decisions within this code hinge on confirming the material (polyester), the characteristic (high tenacity), the construction (single yarn), the decitex not exceeding 920, and crucially, the twist rate being less than 5 turns per meter. Absence of texturing is also a key identifier for this specific sub-heading.