8487.10.00 - Ships' or boats' propellers and blades therefor

This HTS category, 8487.10.00, specifically covers propellers designed for ships and boats, as well as individual blades intended for such propellers. These are integral components of marine propulsion systems, designed to convert rotational motion into thrust for vessels. The classification applies to both complete propellers and their constituent blades, regardless of the specific type of watercraft they are intended for, from small pleasure boats to large commercial vessels.

At this level of the tariff schedule, the primary distinction is made between this specific category and other residual "parts of machinery, not elsewhere specified" covered under 8487.90.00. While 8487.90.00 acts as a general catch-all for machinery parts not falling into more specific headings, 8487.10.00 carves out a distinct niche for marine propellers and their blades, acknowledging their specialized nature and function.

Within this category, further subclassification is provided to distinguish propellers and blades based on their material composition. Subcategory 8487.10.00.40 specifically addresses those made of copper and its alloys, often chosen for their corrosion resistance in marine environments. The broader subcategory 8487.10.00.80 encompasses all other propellers and blades not made of copper, which may include those manufactured from other metals, composites, or plastics.