7318.15.80 - Having shanks or threads with a diameter of 6 mm or more

This HTS category, 7318.15.80, encompasses screws and bolts made of iron or steel that are threaded and possess a shank or thread diameter measuring 6 millimeters or greater. This classification is specifically for those threaded articles that do not fall under other more specific subheadings within the "Other screws and bolts" grouping.

Crucially, this category is distinguished from its sibling, 7318.15.60, by a definitive physical characteristic: the diameter of the shank or threads. While 7318.15.60 covers screws and bolts with diameters less than 6 mm, this subheading focuses exclusively on those fasteners that meet or exceed the 6 mm threshold. This distinction is a primary criterion for accurate classification.

Within this category, further subdivisions exist to refine classification. The subheading 7318.15.80.20 specifically identifies "set screws," a particular type of fastener designed to secure one object within another. Following this, a further "Other" subheading exists to capture all remaining screws and bolts that meet the diameter criteria but are not set screws, allowing for a comprehensive classification system.