Aluminum castings and forgings that have been further worked into a finished article with a specific function — such as an automotive part or a valve body — are generally classified in the heading for that finished article rather than under 7616.99. The NESOI lines 7616995160 and 7616995170 apply to castings and forgings that remain in a semi-finished state or whose function is not captured by a more specific heading. CBP binding rulings are advisable for high-volume shipments where the classification boundary is unclear.

The US schedule provides a dedicated line (7616995140) for aluminum venetian blinds and their parts within 7616.99, which simplifies classification for that specific product. However, importers should confirm that the goods are actually venetian blinds — slatted, adjustable window coverings — rather than other types of window shading products, which may fall under different headings in Chapter 63 (textiles) or elsewhere depending on their construction and primary material.