5106.20.00.00 - Containing less than 85 percent by weight of wool (400)

This HTS classification covers yarn spun from wool fibers, specifically when that yarn contains less than 85 percent by weight of wool. The remaining percentage of the yarn must be comprised of other textile materials. This category encompasses yarn that is not specifically prepared or packaged for sale directly to consumers, but rather intended for further manufacturing or industrial use.

It is crucial to distinguish this classification from its sibling category, 5106.10.00, which covers yarn containing 85 percent or more by weight of wool. The definitive criterion for differentiating between these two is the precise percentage of wool content in the yarn. This distinction is fundamental for accurate tariff application and trade reporting.

As this is a terminal classification within the HTS structure, there are no further subcategories for this specific yarn type. Therefore, classification under 5106.20.00.00 relies solely on the wool content percentage and the general nature of the yarn (carded, not put up for retail sale), aligning with the broader scope of Chapter 51 which deals with wool and animal hair yarns.