Electron Gun Subassembly for CRT
This subassembly includes cathodes, control grids, and focusing electrodes that form the core of the electron gun in cathode-ray tubes. It is machined and assembled for direct installation into oscilloscope or display CRTs. Falls under HTS 8540.91.50.00 as other CRT parts not specified as front panel assemblies.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If specialized for oscilloscopes or measuring instruments
Electron guns for instrument CRTs may classify under parts of measuring/display instruments in 9030.
If for video projection tube applications
Certain CRT subassemblies for video projectors fall under specific TV projector parts in 8529.
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Import Tips & Compliance
• Include technical drawings showing CRT-specific design; declare as unfinished if not fully assembled to avoid parts of finished goods classification; watch for anti-dumping duties on certain origins
Related Products under HTS 8540.91.50.00
CRT Bulb Spacer Ring
Precision ceramic ring that maintains exact spacing between CRT funnel and front panel during assembly bonding. Thermal expansion matched to glass. Other parts 8540.91.50.00.
CRT Internal Magnetic Shielding Foil
Mu-metal foil liner applied inside CRT funnel to shield electron beams from external magnetic interference. Precision cut for specific tube geometry. Other parts HTS 8540.91.50.00.
Electron Gun Cathode Heater Assembly
Tungsten filament heater coil assembly that thermionically emits electrons from cathode in CRT electron guns. Oxide-coated for longevity. 8540.91.50.00 classification.
CRT Convergence Purify Magnet Assembly
Adjustable permanent magnet ring assembly mounted on CRT neck for electron beam convergence and purity correction during setup. Neodymium composition. Other CRT parts.
CRT Socket Base for Electron Gun
Ceramic/phenolic socket with high-voltage pins that electrically connects the electron gun to the CRT neck power leads. Precision molded for vacuum sealing. Other CRT parts per 8540.91.50.00.
Picture Tube Base Glass Seal
Fused glass-to-metal seal that hermetically connects the CRT base pins to the glass envelope while maintaining vacuum integrity. Custom frit composition for thermal matching. Classified 8540.91.50.00.