7019.13.15 - Other

This HTS category, 7019.13.15, encompasses "Other" yarns within the broader classification of glass fibers and articles thereof. Specifically, it pertains to yarns that are not colored and are not otherwise specifically provided for under the preceding subheadings. This classification is designed to capture glass fiber yarns that do not fit into more narrowly defined categories, ensuring comprehensive coverage of this material.

Distinguishing this category from its siblings, such as 7019.13.05.00, is crucial. The sibling category explicitly covers fiberglass rubber reinforcing yarn, defined by specific filament diameter ranges and impregnation treatments designed for adhesion to polymeric compounds. In contrast, 7019.13.15 is a residual category for yarns that do not meet these precise specifications, implying a broader range of applications or less specialized treatments.

This category is further subdivided to accommodate differing end-uses. Subcategory 7019.13.15.40 is designated for yarns of a kind used in industry as packing or lubricating materials, indicating a functional distinction based on application. The remaining subcategory, 7019.13.15.80, serves as a further "other" category for all remaining yarns that do not fall into the packing or lubricating material classification, thereby ensuring all uncolored, non-specifically classified glass fiber yarns are accounted for within the HTS.