5101.19.60.30 - Not finer than 58s

This HTS subheading specifically classifies greasy wool that is not finer than 58s count. "Greasy wool" refers to wool as it is shorn from the sheep, retaining its natural grease (lanolin) and impurities. The crucial distinguishing factor here is the fineness of the wool fiber, measured in "s" count, which indicates the number of 560-yard hanks of yarn that can be spun from one pound of wool. Therefore, this category encompasses wool fibers that are coarser than 58s.

The primary distinction of this category lies in its contrast with its sibling category, 5101.19.60.60, which covers greasy wool *finer* than 58s. This means that wool fibers with a higher s-count (indicating a finer fiber) would fall under the sibling category, while wool with a lower s-count, meeting the "not finer than 58s" criterion, belongs here. The "Other" classification at this level indicates that after accounting for specific types of wool within the broader category of greasy wool, this subheading captures the remaining portion that meets the fineness requirement.

As this is a leaf node in the HTS classification system, there are no further subcategories. Classification within this heading is solely determined by the wool being greasy and its fiber fineness not exceeding 58s. Practical classification will involve reference to established wool grading standards and potentially laboratory testing to confirm the s-count if necessary for accurate declaration.