6903.90.00/Silicon Nitride Thermowell/Japan

Silicon Nitride Thermowell from Japan

Silicon nitride ceramic thermowell protecting temperature sensors in petrochemical furnaces. HTS 6903.90.00 refractory tubes/sheaths for high-corrosion environments. Advanced nitride ceramics fired per Chapter requirements.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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Import Tips

• Petrochemical end-use certification; prove >1400°C service temperature

• Avoid Chapter 85 sensor classification by importing separately