7318.14.50 - Having shanks or threads with a diameter of 6 mm or more

This HTS category, 7318.14.50, specifically classifies self-tapping screws made of iron or steel that possess shanks or threads with a diameter of 6 millimeters or greater. These fasteners are designed to create their own threads when driven into materials such as metal or plastic, simplifying assembly processes. The defining characteristic for inclusion in this code is the substantial diameter of the screw's threading or shank.

Distinction from its sibling category, 7318.14.10, is solely based on this physical dimension. While both are self-tapping screws of iron or steel, 7318.14.10 covers those with a diameter *less than* 6 millimeters. Therefore, the 6 mm threshold serves as the critical differentiating factor at this level of classification.

Within this diameter range, further subclassification is required. The subcategories 7318.14.50.20 and 7318.14.50.80 distinguish between self-tapping screws with a diameter of 6 mm or more made of stainless steel, and all other such screws, respectively. This breakdown allows for more granular tracking and tariff application based on the specific material composition of these larger diameter self-tapping screws.