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National Plastics and Seals is recognized globally as one of the leading suppliers of O-rings and seals. An O-ring, also known as a packing, or a toric joint, is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a round cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface.

  • Material types:
    • Buna
    • Viton
    • Nitrile (Buna-N)
    • Silicone
    • EPDM
    • Polyurethane
    • PTFE
    • Neoprene
  • Hardness Scale:
    • 70D
    • 90D
    • 75D
  • Colors:
    • Black
    • Brown
    • Red
    • Orange
  • Sizing:
    • Various sizes available, please call with your specific requirements.

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As an ISO 9001 company who practices lean manufacturing, and Kaizen/5S principles we’re committed to quality in everything we do. We have the ability to meet numerous industry standards, including those set forth by the American Society of Mechanical Engineers, U.S. Department of Transportation, the Federal Aviation Administration, the Food and Drug Administration, and the Society of Automotive Engineers.

To learn more about our rubber O-ring and plastic seal offerings, or to discuss your specific application needs with an expert, reach out to the team today. We’re on hand to answer any questions you may have.