Mica Vacuum Tube Spacers
Stamped mica washers and spacers insulating electrodes in vacuum tubes for radios and amplifiers. HTS 6814.90.00.00 applies to these worked mica electronic insulators.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If parts of vacuum electron tubes
Mica components integral to finished vacuum tubes classify under heading 8543.
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 tube assembly diagrams showing spacer function without constituting complete tubes
• Declare as 'other mica articles' explicitly on commercial invoice
• Avoid sets with metal pins; complete assemblies shift to Chapter 85
Related Products under HTS 6814.90.00.00
Mica Electrical Insulation Sheets
Thin sheets made from worked mica, often split or cleaved, used for electrical insulation in motors and transformers. They fall under HTS 6814.90.00.00 as articles of worked mica not specified elsewhere, providing high dielectric strength and thermal resistance.
Agglomerated Mica Heating Element Plates
Plates made from reconstituted mica bonded with binders, shaped for use in electric heaters and toasters. Classified under HTS 6814.90.00.00 as agglomerated articles of mica designed for high-temperature applications.
Mica Window Strips for Furnaces
Transparent strips of split mica used as peephole windows in high-temperature furnaces and stoves. They are worked mica articles under HTS 6814.90.00.00, valued for heat resistance without melting or cracking.
Reconstituted Mica Gaskets and Seals
Die-cut gaskets from agglomerated mica sheets for sealing high-pressure steam pipes and valves. HTS 6814.90.00.00 covers these as articles of reconstituted mica for industrial sealing.
Split Mica Capacitor Dielectrics
Ultra-thin split mica layers silvered on one side for use as dielectrics in high-frequency capacitors. As worked mica articles, they are under HTS 6814.90.00.00 before final capacitor assembly.
Mica Shim Stock Sheets
Precision-cut sheets of worked mica used as shims for machinery alignment in precision equipment. Classified in HTS 6814.90.00.00 as other articles of worked mica for industrial spacing.