Low-Expansion Glass Rods for Optical Seals
Unworked borosilicate rods designed for hermetic sealing with optical fibers and metal in photonics devices. Meets 7002.32.00.00 criteria for low coefficient of expansion glass rods.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If processed into finished optical elements
Glass rods ground/polished for optical use classify under optical fibers/elements.
If ordinary glass without expansion specification
Standard optical glass rods lacking thermal specs fall in other unworked glass.
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Import Tips & Compliance
• Provide sealing compatibility data with Kovar/metal alloys for end-use verification
• Declare refractive index if relevant, but emphasize unworked status
Related Products under HTS 7002.32.00.00
Pyrex-Type Borosilicate Glass Rods
Unworked solid glass rods made from borosilicate with controlled low thermal expansion (≤5 x 10⁻⁶/K), ideal for stirring rods, thermometer tubes, and scientific instrument components. HTS 7002.32.00.00 covers these as unworked rods of low-expansion glass before any fabrication.
Borosilicate Glass Capillary Tubes
Thin-walled, unworked borosilicate capillary tubes with low expansion coefficient for chromatography, medical diagnostics, and precision instrumentation. HTS 7002.32.00.00 applies to these unprocessed tubes before drawing to final bore size.
Glass Tubes for High-Temperature Manometers
Borosilicate tubing with low thermal expansion for precision pressure gauges operating at elevated temperatures. Unworked status qualifies for 7002.32.00.00 classification.
Low-Expansion Glass Rods for Laser Housings
Solid borosilicate rods for thermal mounts in high-power laser systems where dimensional stability is critical. Classifies under 7002.32.00.00 as unworked low-expansion glass rods.
Borosilicate Condensate Trap Tubes
Unworked glass tubes for cold traps in vacuum distillation systems, leveraging low expansion for thermal cycling. HTS 7002.32.00.00 for low-expansion unworked tubes.
Borosilicate Glass Laboratory Tubing
Unworked borosilicate glass tubing with a low linear coefficient of expansion (≤5 x 10⁻⁶/K from 0-300°C), used for fabricating laboratory equipment like test tubes and reaction vessels. Classified under HTS 7002.32.00.00 as unworked tubes of low-expansion glass, prior to any cutting, bending, or sealing.