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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as bulk glass components
Glass-to-metal seals without CRT specification may fall under fabricated glass articles.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide frit composition analysis; test for helium leak rates; document Kovar pin material specs
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.
Sony Trinitron CRT Neck Assembly
The neck assembly for Sony Trinitron cathode-ray tubes contains the electron gun structure that generates and accelerates electron beams for phosphor excitation on the screen. It is a replacement part specifically designed for incorporation into vintage television and monitor CRTs. Classified under 8540.91.50.00 as 'other' parts of cathode-ray tubes, excluding front panel assemblies.