8433.90 - Parts:

This category, HTS Code 8433.90, encompasses all parts specifically designed for use with machines classified under heading 8433. Heading 8433 broadly covers harvesting or threshing machinery, including straw or fodder balers, grass or hay mowers, and machines for cleaning, sorting, or grading agricultural produce. Therefore, this section is dedicated to components and accessories that facilitate the function and operation of these agricultural machines.

It is crucial to distinguish this category from its sibling categories, which classify the complete machines themselves. For example, while 8433.20.00 covers "Other mowers," 8433.90.00 covers the individual parts that constitute such mowers. Similarly, parts for straw or fodder balers (8433.40.00.00) or other haymaking machinery (8433.30.00.00) would fall under this heading if they are not complete machines. This category specifically addresses the modular components, not the assembled end products.

Within HTS 8433.90, two subcategories exist to further refine the classification of these parts. 8433.90.10 is designated for parts specifically originating from "mowers for lawns, parks or sports grounds." The remaining parts for machines covered under heading 8433, which are not from lawnmowers, are classified under 8433.90.50, serving as a residual category for all other parts of harvesting and threshing machinery. This breakdown allows for greater specificity in tariff application based on the original machine's function.