Butyl Rubber O-Ring for Vacuum Chamber Seals from Japan
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.
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%
Import Tips
• 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