7229.90.50.16 - With a diameter of less than 1.0 mm

This HTS category, 7229.90.50.16, specifically classifies wire of other alloy steel that is round in cross-section and possesses a diameter of less than 1.0 mm. It falls under the broader classification of "other" alloy steel wire and "other" round wire, indicating it's a more granular breakdown beyond general alloy steel wire. The defining characteristic for inclusion in this specific subcategory is its very fine diameter.

This classification is distinguished from its siblings primarily by precise diameter measurements. Category 7229.90.50.31 covers round alloy steel wire with a diameter of 1.0 mm or more but less than 1.5 mm, while 7229.90.50.51 includes wire with a diameter of 1.5 mm or more. Therefore, this node is for the thinnest of the round alloy steel wires within the 7229.90.50 grouping.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Classification within this code is finalized based on the material being alloy steel, the wire being round, and its diameter being strictly under 1.0 mm. Examples of products that might fall here include very fine welding wire for specialized applications, microfilaments for certain industrial processes, or fine wires used in the electronics or medical device industries where precision and small dimensions are critical.