Fused Silica Thermocouple Protection Tube from Japan
Unworked tube-like rod of fused silica designed to sheath thermocouples in high-temperature furnaces. Classified in HTS 7002.20.10.00 as it is an unworked rod or tube of fused silica, not further processed before annealing.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include thermal expansion data in documentation to prove high-purity fused silica suitable for 1000°C+ applications
• Avoid declaring as 'finished tube' to prevent reclassification; specify 'unworked rod stock'
• Check for exemptions under HTSUS for scientific instrument components if end-use qualifies