7217.20.45.40 - Containing by weight less than 0.25 percent of carbon

This HTS classification, 7217.20.45.40, specifically covers wire made from iron or nonalloy steel that has been plated or coated with zinc. The defining characteristic of this particular subcategory is its low carbon content, which must be less than 0.25 percent by weight. This designation is critical for distinguishing it from other wires within the same broader category.

The key differentiator for this classification lies in its precise carbon percentage. It stands apart from sibling categories such as 7217.20.45.50, which is for wire containing 0.25 percent or more but less than 0.6 percent carbon, and 7217.20.45.60, which includes wire with 0.6 percent or more carbon. Therefore, accurate carbon analysis of the ferrous material is essential for correct classification under this code.

Since this HTS code represents a "leaf node" in the classification structure, there are no further subdivisions beneath it. The classification is complete at this point, encompassing zinc-plated or coated iron or nonalloy steel wire meeting the specified diameter and low carbon content criteria. Examples of goods that would fall under this classification include certain types of low-carbon galvanized steel wire used in general manufacturing, fastening applications, or as reinforcement where ductility and resistance to corrosion are primary considerations.