7318.15.40.00 - Machine screws 9.5 mm or more in length and 3.2 mm or more in diameter (not including cap screws)

This HTS category, 7318.15.40.00, specifically classifies machine screws that meet defined dimensional criteria. To fall within this subcategory, the screws must be 9.5 millimeters or more in length and 3.2 millimeters or more in diameter. Importantly, this classification excludes cap screws, which are differentiated by their distinct head designs.

Distinguishing this category from its siblings, 7318.15.20 covers bolts, along with their nuts or washers, when imported or exported together. Category 7318.15.50 is reserved for studs, which are threaded rods without heads. This subcategory, 7318.15.40.00, therefore, serves as a specific grouping for machine screws based on their size and the exclusion of cap screw types.

As this is a leaf node in the HTS structure, there are no further subcategories. Classification under 7318.15.40.00 relies solely on the precise measurement of length and diameter, coupled with the understanding that the item is a screw intended for use in machinery, and not a cap screw or a bolt. This ensures a granular level of detail for accurate import and export declarations.