7318.16.00 - Nuts

This HTS category, 7318.16.00, specifically classifies nuts of iron or steel. A nut is a type of fastener characterized by an internal threaded hole designed to mate with a bolt or screw. These articles are essential components in mechanical assemblies, providing a means to secure, join, or tighten other parts.

Distinguishing this category from its siblings, 7318.16.00 focuses exclusively on threaded fasteners where the internal threading is the defining feature. For instance, while 7318.11.00.00 covers coach screws (which are externally threaded and designed for wood), and 7318.15 covers other screws and bolts (also primarily externally threaded), this heading is dedicated to the internally threaded counterpart. Similarly, screw hooks and rings (7318.13.00) have distinct functional shapes beyond simple threaded nuts.

Within this classification, further distinctions are made to refine the classification of nuts. The subcategories "Lugnuts" and "Other" indicate a division based on specific types of nuts, such as specialized lugnuts used for securing wheels on vehicles, versus a broader category for all other types of nuts not specifically enumerated. This allows for more precise tariff application based on the unique design and intended use of the nut.