8540.60.00 - Other cathode-ray tubes

HTS Code 8540.60.00 encompasses "Other cathode-ray tubes." This category serves as a residual classification for cathode-ray tubes (CRTs) that do not fall under more specific headings within Chapter 8540. The primary characteristic of these tubes is the generation of a visible image through the bombardment of a fluorescent screen by a beam of electrons, typically controlled by deflection coils. This classification applies to CRTs used in a variety of applications where their image-producing capabilities are utilized, but which are not specifically designated as television picture tubes, camera tubes, or display tubes with precise screen pitch requirements.

This category is distinct from its sibling categories by excluding CRTs designed for direct television reception (which would fall under a more specific subcategory for television picture tubes), specialized image conversion or intensification, or those specifically defined by their screen pitch for data and graphic displays. It also differentiates itself from microwave tubes, which operate on entirely different principles for generating or amplifying microwave frequencies. Essentially, 8540.60.00 captures CRTs that are not exclusively defined by their role in television broadcasting, scientific imaging, or high-resolution computer displays.

The subcategories within 8540.60.00 are organized to further refine the classification based on the physical dimension of the screen. Specifically, further subdivisions are made by considering "Having a video display diagonal." This allows for a more granular classification of these residual CRTs based on their screen size, which can be a significant factor in their intended use and market.