7304.29.41.30 - Having a wall thickness less than 12.7 mm

This HTS classification, 7304.29.41.30, specifically identifies seamless tubes and pipes made of iron or steel that are designed for drilling operations in the oil and gas industry. Within the broader category of casing, tubing, and drill pipe, this subcategory focuses on products classified as "other alloy steel" and further refined by their physical dimensions. The defining characteristic for this particular classification is a wall thickness that is less than 12.7 millimeters.

The key distinction between this category and its sibling, 7304.29.41.40, lies solely in the wall thickness. While both classifications pertain to alloy steel casing used in oil and gas drilling and share the same outside diameter range (215.9 mm or more but not exceeding 285.8 mm), this entry exclusively covers those with a wall thickness *under* 12.7 mm. The sibling category, conversely, encompasses casing with a wall thickness of 12.7 mm or greater. This precise measurement is critical for customs authorities to ensure accurate duty assessment and trade statistics.

As this HTS code represents a leaf node, there are no further subcategories. Therefore, the focus for classification at this level is on confirming that the product meets all preceding criteria: being seamless, of iron or steel, designed for oil and gas drilling (casing, tubing, or drill pipe), made of other alloy steel, and having an outside diameter within the specified range, with the decisive factor being a wall thickness strictly less than 12.7 mm.