7409.21.00.10 - Of a thickness of 5 mm or more

This classification covers copper-zinc base alloy (brass) plates, sheets, and strip that are supplied in coils and possess a substantial thickness of 5 millimeters or more. These products are characterized by their substantial gauge and are specifically designed for applications where rigidity, strength, and significant material mass are required. Examples include heavy-duty structural components, large industrial shielding, or decorative elements where the thickness is a primary design consideration.

It is crucial to distinguish this category from its sibling, which covers brass coils of a lesser thickness. The 5 mm threshold is a definitive physical characteristic that separates heavier-gauge brass products from those intended for lighter applications such as intricate decorative work, thin sheeting, or flexible components. Adherence to this thickness criterion is paramount for accurate classification.

As a leaf node, this classification does not have further subcategories. Therefore, classification into this specific code relies solely on meeting the material (copper-zinc base alloy, brass), form (plates, sheets, strip in coils), and the specified thickness (5 mm or more) criteria. Any brass coils below this thickness would fall under the sibling category.