7227.90.60.40 - With a diameter of 19 mm or more

This HTS category, 7227.90.60.40, specifically covers hot-rolled bars and rods of other alloy steel, supplied in irregularly wound coils, that have a circular cross-section and a diameter of 19 mm or more. These items are a subset of "other alloy steel" products that fall under the broader classification of iron and steel. The classification relies on a precise measurement of the product's diameter to determine its inclusion within this specific code.

The distinguishing factor for this category lies in its diameter specification. It differentiates from sibling categories by covering only those rods with a diameter of 19 mm or greater. Sibling categories 7227.90.60.30 and 7227.90.60.35 delineate products with smaller diameters, covering those less than 14 mm and those between 14 mm and 19 mm respectively. Therefore, the 19 mm threshold is critical for accurate classification within this group.

As this is a leaf node in the HTS classification, there are no further subcategories under 7227.90.60.40. Classification into this code is therefore definitive based on the material (other alloy steel), form (hot-rolled, irregularly wound coils), cross-section (circular), and the specified diameter of 19 mm or more. Importers and exporters must ensure these characteristics precisely match the product to avoid misclassification.