Butyl Rubber O-Ring for Vacuum Chamber Seals
Low-permeation butyl IIR O-ring for maintaining vacuum in semiconductor processing chambers. Classifies under HTS 4016.93.50.10 as vulcanized rubber O-ring seal. Excellent gas impermeability.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If part of vacuum pump or chamber assembly
Apparatus control valves with rubber seals classify by function.
If imported as cut-to-length rubber profile stock
Unworked rubber profiles over 5mm classify in heading 4008.
If silicone preferred for ultra-high vacuum
Material-specific statistical reporting within seals category.
Not sure which classification is right?
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Import Tips & Compliance
• Outgassing data sheets required for cleanroom/semiconductor qualification
• Specify permeation rates vs other rubbers to justify butyl classification
• ESD-safe packaging prevents contamination during transit
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