9013.90 - Parts and accessories:

This HTS category, 9013.90, specifically encompasses parts and accessories for a variety of optical, measuring, and precision instruments. It is a crucial classification for identifying components that, while not complete instruments themselves, are essential for the function or assembly of the devices described in Chapter 90. This includes, but is not limited to, items like lenses, prisms, reticles, mounts, and housings that are designed for use with the instruments classified under headings like 9013.10, 9013.20, and 9013.80.

Distinguishing 9013.90 from its sibling categories is key. While 9013.10, 9013.20, and 9013.80 describe the complete instruments themselves (telescopic sights, lasers, and other optical devices respectively), 9013.90 focuses solely on the individual pieces that make up these instruments. For example, a complete telescopic sight falls under 9013.10, but a specific lens or mounting bracket intended for that sight would be classified under 9013.90.

To further refine classification, the subcategories under 9013.90 differentiate based on the specific type of instrument to which the parts and accessories pertain. For instance, 9013.90.20.00 specifically addresses parts and accessories of telescopic sights for rifles, indicating a specialized application. The broader "Other" subcategory under 9013.90 serves to capture parts and accessories for the remaining instruments within heading 9013 that are not explicitly itemized.