8708.99.06.00 - Double flanged wheel hub units incorporating ball bearings

This HTS category, 8708.99.06.00, specifically covers double flanged wheel hub units that incorporate ball bearings. These are integral components for vehicles, designed to facilitate the rotation of wheels while supporting their load. The "double flanged" characteristic refers to the design of the hub unit, which typically features flanges on both sides for mounting to the axle and the wheel, respectively. The inclusion of ball bearings is a key defining feature, indicating a unit pre-assembled with its rolling element bearings.

Distinguishing this category from its siblings, 8708.99.03.00 covers general vibration control goods containing rubber, such as mounts or bushings, which may be part of a vehicle but are not specifically wheel hub units. Similarly, 8708.99.16.00 is for other parts of power trains, which could include components like gears, shafts, or transmissions, but not the wheel hub assembly itself. 8708.99.23.00 serves as a residual category for any other parts and accessories of motor vehicles not elsewhere specified. Therefore, 8708.99.06.00 is precisely for the integrated wheel hub and bearing assemblies.

As this HTS code represents a leaf node, there are no further subcategories. Classification under this heading is determined by the presence of a double-flanged wheel hub unit explicitly designed to house and operate with ball bearings, often sold as a single, pre-assembled component. This unit's primary function is to connect the wheel to the vehicle's suspension and allow for smooth rotation, making it a distinct and specific automotive part.