8716.90.30.00 - Castors, other than those of heading 8302

This HTS category, 8716.90.30.00, specifically covers castors designed for use as parts and accessories of vehicles falling under heading 8716, excluding those castors already classified under heading 8302. These castors are typically wheeled components that allow for the movement and positioning of trailers, semi-trailers, or other non-motorized vehicles. They may be fixed or swivel, and their primary function is to facilitate the rolling motion of the larger vehicle, particularly when unhitched or during maneuvering.

It is crucial to distinguish this category from its siblings. Category 8716.90.10 pertains to parts of farm wagons and carts, implying a specific agricultural application. In contrast, 8716.90.30.00 encompasses castors for a broader range of vehicles within the 8716 heading, not limited to agricultural use. The residual category, 8716.90.50, covers all other parts not specifically listed in the preceding subcategories, making 8716.90.30.00 a distinct classification for this particular type of component.

As this is a leaf node, there are no further subcategories. Classification within 8716.90.30.00 is determined by the castor's intended use as a part of a non-mechanically propelled vehicle under heading 8716, and the explicit exclusion of castors classifiable under heading 8302. The physical characteristics, such as material composition (metal, plastic, rubber) and mounting mechanisms, are secondary to the primary criterion of their intended application within the broader context of trailer and vehicle accessories.