7217.10.40 - With a diameter of less than 1.5 mm

This HTS category encompasses wire made from iron or non-alloy steel that has not been plated or coated, even if it has undergone a polishing process. Specifically, it covers round wire with a diameter measuring less than 1.5 millimeters. These characteristics are crucial for distinguishing this product from other categories within heading 7217.

The primary distinction from its sibling category, 7217.10.50, lies solely in the physical dimension of the wire's diameter. While 7217.10.50 covers round wire with a diameter of 1.5 mm or more, this category is exclusively for round wire that is finer, measuring less than 1.5 mm in diameter. Both categories, however, share the same criteria regarding material composition (iron or non-alloy steel) and the absence of plating or coating.

Within this classification, further subdivisions exist to refine the classification based on specific treatments. The subcategory "Heat treated" addresses wire that has undergone specific thermal processes to alter its properties. The residual "Other" subcategory captures wire that does not meet the criteria for specific treatments, providing a catch-all for the remaining products that fit the primary description of fine, uncoated, round iron or non-alloy steel wire.