7320.20.50.45 - Helical springs, of wire having a cross-sectional dimension of 5.1 mm or more but less than 12.7 mm

This HTS category, 7320.20.50.45, specifically classifies helical springs manufactured from iron or steel wire. The defining characteristic for inclusion in this subheading is the cross-sectional dimension of the wire used in the spring's construction. These springs must be made from wire that measures 5.1 millimeters or greater, but less than 12.7 millimeters, in its cross-section. This precise measurement is critical for accurate classification.

Distinguishing this category from its siblings, other helical springs are classified based on their wire's cross-sectional dimension. For instance, helical springs made from wire with a cross-sectional dimension of less than 5.1 mm would fall under a different subheading. The sibling category "Other" (7320.20.50.60) would encompass helical springs that do not meet the specific wire dimension criteria of this or other specified subheadings within the "Helical springs" grouping.

As this is a leaf node, there are no further subcategories. Therefore, classification within 7320.20.50.45 depends entirely on confirming that the helical spring is indeed made of iron or steel wire and that the wire's cross-sectional dimension falls within the specified range of 5.1 mm to less than 12.7 mm. Practical examples would include certain types of compression springs, extension springs, or torsion springs where this specific wire gauge is utilized.