8483.90.80.40 - Parts of universal joints

This HTS classification covers specific parts designed for use in universal joints. Universal joints are mechanical couplings that transmit rotary motion between two shafts that are not in line, allowing for variations in angle and distance. Therefore, this category includes components such as trunnions, bearing cups, yokes, or other specialized pieces that are exclusively manufactured or adapted for the construction or repair of universal joints. The classification hinges on the specific function and design of these parts, indicating their direct and integral role within the universal joint assembly.

This particular classification, 8483.90.80.40, is distinguished from its sibling categories by its precise focus. Subheading 8483.90.80.10 pertains to parts of articles classified under subheading 8483.60.80, which relates to other types of clutches and shaft couplings. The "Other" subheading 8483.90.80.80 serves as a residual category for parts of transmission elements not otherwise specified. Consequently, 8483.90.80.40 isolates parts solely for universal joints, ensuring accurate segregation from components of different coupling mechanisms or general transmission elements.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Classification at this level is final, meaning that any item fitting the description of "parts of universal joints" and not specifically covered by a more granular subheading would be entered here. The key to correct classification rests on the determination that the part's intended use and construction are exclusively for a universal joint, as opposed to other shaft couplings or general machinery components.