7318.14.10 - Having shanks or threads with a diameter of less than 6 mm

This HTS classification, 7318.14.10, specifically covers self-tapping screws made of iron or steel that possess shanks or threads with a diameter measuring less than 6 millimeters. These fasteners are designed to create their own threads when driven into materials such as metal, plastic, or wood, simplifying assembly processes. Their application is broad, encompassing various assembly and repair functions across numerous industries.

It is crucial to distinguish this category from its sibling, 7318.14.50. While both fall under self-tapping screws of iron or steel, the defining difference lies in the physical dimension of the shank or thread diameter. HTS 7318.14.10 is exclusively for those screws with a diameter strictly under 6 mm, whereas the sibling category applies to self-tapping screws with a diameter of 6 mm or greater. This distinction is critical for accurate customs declarations and duty assessment.

Within this category, further subdivisions exist to refine classification based on material composition. The subcategory 7318.14.10.30 is designated for self-tapping screws (less than 6 mm diameter) that are manufactured from stainless steel. All other self-tapping screws meeting the diameter criteria but not made of stainless steel fall under the "Other" subcategory, 7318.14.10.60. This granular breakdown allows for precise tariff application based on the specific alloy used in the screw's construction.