Zirconia Ceramic Spark Plug Insulators
High-strength zirconia insulators for automotive and industrial spark plugs, providing 30kV+ dielectric strength and thermal shock resistance. The ceramic core insulates the central electrode from the metal shell. Classifies under 8546.20.00.90 as other ceramic electrical insulators.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If when imported as complete spark plug assemblies
Finished spark plugs (with electrodes) classify under ignition equipment heading.
If for non-electrical high-temperature applications
Refractory zirconia ceramics without electrical function use Chapter 69.
If dedicated solely for diesel engine use
Spark plug parts specifically for spark-ignition engines may classify as engine parts.
Not sure which classification is right?
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Import Tips & Compliance
• Provide yttria-stabilized zirconia composition and thermal expansion coefficient data
• Include spark plug thread size compatibility and bend strength (>800MPa) specs
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