7304.29.61.15 - Having a wall thickness not exceeding 9.5 mm

This HTS classification covers seamless tubes and pipes, as well as hollow profiles, made from iron or steel, specifically of the "other alloy steel" variety. The goods within this category are further defined by their intended use as casing, tubing, or drill pipe for oil and gas drilling operations. Crucially, for inclusion here, these specific alloy steel tubes and pipes must have an outside diameter not exceeding 114.3 mm.

This particular classification distinguishes itself from its sibling at the same level, HTS code 7304.29.61.30, based on a precise physical characteristic: wall thickness. While this category encompasses items with a wall thickness *not exceeding* 9.5 mm, the sibling category is for those with a wall thickness *exceeding* 9.5 mm. This distinction is a critical factor in ensuring accurate customs declaration and duty assessment.

As this node represents a leaf category within the HTS structure, there are no further subcategories. Therefore, the classification is finalized at this point, with the primary determining factors being the material (other alloy steel), the application (oil and gas drilling), the outside diameter limit, and the specific wall thickness range defined herein.