9031.90.54.00 - Of optical instruments and appliances of subheading 9031.41 or 9031.49.70

HTS Code 9031.90.54.00 specifically covers parts and accessories for certain optical instruments and appliances that fall under subheadings 9031.41 and 9031.49.70. This designation indicates components, attachments, or auxiliary items designed to support the functioning of these particular types of measuring, checking, or inspection equipment. Examples of such instruments might include optical comparators, optical measurement machines, or other precision optical devices used for verifying dimensions, shapes, or surface qualities.

This category is distinguished from its sibling, 9031.90.45.00, which is exclusively for bases and frames related to coordinate-measuring machines under subheading 9031.49.40. While both fall under the broader "Parts and accessories" of measuring and checking instruments, 9031.90.54.00 has a more specialized application, pertaining to parts for optical instruments that are not coordinate-measuring machines covered by the sibling.

As this is a leaf node within the HTS database, there are no further subcategories to introduce. Classification within 9031.90.54.00 relies on the accurate identification of the parent optical instrument's classification under 9031.41 or 9031.49.70, ensuring that the part or accessory's intended use is directly linked to these specific optical measurement devices.