PTFE Washer Seal from Mexico
A flat washer seal crafted from polytetrafluoroethylene (PTFE), a fluoropolymer of heading 3904, for chemical processing equipment flanges. Classified in 3926.90.45.90 as an other plastic washer for sealing. Its chemical resistance makes it ideal for corrosive environments.
Duty Rate — Mexico → United States
13.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Provide chemical analysis reports proving PTFE predominance per Chapter 39 polymer notes
• Label as 'sealing washer' to distinguish from plain spacers under 3926.90.99
• Ensure dimensions comply with USNote for small articles if seeking special rates