7318.13.00 - Screw hooks and screw rings

This HTS category, 7318.13.00, specifically encompasses screw hooks and screw rings manufactured from iron or steel. These articles are characterized by a threaded shank designed to be screwed into a surface or material, with the opposite end formed into a hook or a ring shape. Their primary purpose is for fastening, hanging, or securing items, leveraging their shape to provide a point of attachment or suspension.

While this category falls under the broader heading of threaded articles of iron or steel (7318), it is distinct from its sibling categories. For instance, coach screws (7318.11.00.00) are designed for woodworking and have a distinct head shape, while other wood screws (7318.12.00.00) serve a similar purpose but lack the hook or ring formation. Self-tapping screws and other screws and bolts (7318.14 and 7318.15 respectively) are general fastening elements and do not possess the specialized hook or ring feature that defines this classification.

The subdivisions within 7318.13.00 are based on the physical dimension of the article's shank or thread diameter. This distinction between articles with a diameter of less than 6 mm (7318.13.00.30) and those with a diameter of 6 mm or more (7318.13.00.60) allows for more precise classification based on the size and intended load-bearing capacity of the screw hook or ring. This granular detail is crucial for accurate tariff assessment and statistical reporting.