Fused Silica Precision Metrology Rod
Ultra-stable unworked fused silica rod used as gauge blocks or reference standards in precision measurement. Classified HTS 7002.20.10.00 for unworked rods, valued for minimal thermal expansion.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If finished into measuring instruments
Precision gauge blocks become Chapter 90 measuring devices.
If in tube form for metrology applications
Same material but tubular form uses different subheading.
If other precious metal-free metrology articles
Rare case if considered jewelry-like precision articles.
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Import Tips & Compliance
• Include coefficient of thermal expansion data (<0.5 ppm/°C)
• Calibrate import weights precisely; metrology rods command high value
• ISO 17025 traceability documentation recommended
Related Products under HTS 7002.20.10.00
Fused Quartz Optical Rod
A high-purity rod made from fused quartz or fused silica, unworked except for basic forming, used in optical systems and lasers. It falls under HTS 7002.20.10.00 as an unworked rod of fused quartz or other fused silica, prior to any further processing like cutting or polishing.
Fused Silica Thermocouple Protection Tube
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.
Fused Quartz Semiconductor Processing Rod
Cylindrical unworked rod of fused quartz used as stock material for fabricating wafer boats and diffusion tubes in semiconductor manufacturing. It qualifies for HTS 7002.20.10.00 as unworked rods of fused silica, essential for ultra-high purity environments.
Fused Silica Laboratory Stirring Rod
Straight unworked rod of fused silica used in chemical laboratories for mixing reagents without contamination. Falls under HTS 7002.20.10.00 as an unworked rod of fused quartz/silica per the tariff hierarchy for balls, rods, or tubes.
Fused Quartz Fiber Drawing Rod
Unworked fused quartz rod serving as preform material for drawing optical fibers in telecommunications. Classified under HTS 7002.20.10.00 for unworked rods of fused silica, before drawing into fibers.
High-Purity Fused Silica Halogen Lamp Rod
Unworked rod of high-purity fused silica used to fabricate envelopes for halogen cycle lamps. It is classified in HTS 7002.20.10.00 as unworked rods of fused quartz, retaining translucency for lighting applications.