8511.90 - Parts:

HTS Code 8511.90 encompasses "Parts" for the electrical ignition or starting equipment and generators described in heading 8511. This broad category serves as a catch-all for components that are integral to the functioning of the devices listed in the preceding subheadings but are not specifically identified elsewhere within heading 8511. Examples could include housings, brackets, wiring harnesses specific to these ignition/starting systems, or various fasteners and connectors.

This category is distinguished from its sibling subheadings, such as spark plugs (8511.10), ignition magnetos (8511.20), distributors and ignition coils (8511.30), starter motors (8511.40), and other generators (8511.50), by its nature as a component rather than a complete functional unit. While the sibling categories classify specific, identifiable devices, 8511.90 is reserved for the constituent parts that make up these devices. For instance, a complete starter motor falls under 8511.40, but individual gears or solenoid components for that starter motor would likely be classified under 8511.90 if not further specified.

The subcategories within 8511.90, such as "Of voltage and voltage-current regulators with cut-out relays" and "Other parts," indicate further breakdowns based on the specific application or generality of the part. The former specifically addresses components related to voltage regulation within these systems, while the latter, 8511.90.60, is a residual category for all other miscellaneous parts not otherwise classified within the more specific sub-classifications. This hierarchical structure ensures that even granular components are appropriately placed within the tariff schedule, facilitating accurate customs declaration.