7304.39.00.80 - Having a wall thickness of 19 mm or more

This HTS classification, 7304.39.00.80, specifically covers seamless tubes, pipes, and hollow profiles made from iron or non-alloy steel. The defining characteristic of goods falling under this heading is their circular cross-section and a substantial wall thickness of 19 millimeters or more. These are robust steel conduits intended for applications requiring high strength and durability, often in demanding industrial environments.

This category is distinguished from its sibling, 7304.39.00.76, solely by the wall thickness criterion. While both classifications pertain to seamless, circular, iron or non-alloy steel tubes with an outside diameter exceeding 406.4 mm, 7304.39.00.80 is reserved for those with a wall thickness equal to or exceeding 19 mm, whereas the sibling covers those with a wall thickness less than 19 mm. This distinction is crucial for accurate tariff assessment based on the physical specifications of the steel product.

As this is a leaf node within the HTS structure, there are no further subcategories. Therefore, classification within 7304.39.00.80 is determined by the precise physical attributes outlined: seamless construction, circular cross-section, made of iron or non-alloy steel, an outside diameter exceeding 406.4 mm, and critically, a wall thickness of 19 mm or more.