7004.90.30.20 - Measuring over 5 mm in thickness

This HTS classification, 7004.90.30.20, specifically covers drawn or blown glass sheets that are not otherwise worked, falling under the broader category of "Other glass." The defining characteristic of this subcategory is its thickness, measuring over 5 millimeters. These glass sheets are typically produced by drawing or blowing molten glass into a flat sheet, and they may possess surface treatments such as absorbent, reflecting, or non-reflecting layers. However, they must not have undergone any further processing that would alter their fundamental form as a sheet of glass.

This specific classification is distinguished from its sibling category, 7004.90.30.10, by its greater thickness. While both fall under "Measuring over 3.5 mm in thickness" and "Measuring not over 0.26 m2 in area," this node requires the glass to exceed 5 mm in thickness, whereas the sibling covers glass between 3.5 mm and 5 mm inclusive. This precise thickness demarcation is a critical factor for customs classification, influencing trade compliance and duty assessments.

As this is a leaf node within the HTS database, there are no further subcategories to introduce. Classification under 7004.90.30.20 is final, based on the stipulated physical properties of the glass sheets: they are drawn or blown, in sheets, with or without surface layers, not otherwise worked, and measuring over 5 mm in thickness, with the preceding criteria of being rectangular, over 3.5 mm thick, and not exceeding 0.26 m2 in area being met. Examples of such glass might include thicker panes intended for specialized glazing or industrial applications where enhanced thickness is required.