Rubber O-Rings, Seals & Molded Parts

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.

Learn More

The team at National Plastics and Seals prides itself on our ability to exceed customer expectations. We can handle a wide range of order requests, whether clients require a single prototype, low-volume order, high-volume order, or blanket order. Lead times depend on the particular request but can be quoted on a job-by-job basis, and emergency and rush services are available.

National Plastics and Seals has achieved Six Sigma certification (Yellow Belt, Green Belt, and Black Belt), and adheres to lights out manufacturing, lean manufacturing, and Kaizen/5S principles. Our products adhere to various industry standards, such as 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.