O-Rings

High-quality EPDM and silicone O-rings are in stock at Qosina. All our non-sterile O-rings are available in 100-count bags in a range of sizes to complete your project. Shop by material or the inner and outer diameter size. If there’s a size of O-ring or other component that your project requires but isn’t found in our ,a href="https://www.qosina.com/requests/catalog">complimentary 500-plus-page full-color catalog, contact us about custom sourcing options.

EPDM O-Rings

Ethylene propylene diene monomer (EPDM) is a synthetic rubber with a stable, saturated polymer backbone. Choose O-rings made of EPDM for their excellent abrasion resistance, tensile strength and weather resistance. These O-rings can withstand temps from -40 to 302°F (-40 to 150°C). Find black 70A durometer EPDM O-rings in our collection with a 1/16-inch cross section and the following inner and outer diameter options in inches:

  • 5/64 x 13/64
  • 7/32 x 11/32
  • 3/16 x 5/16
  • 5/16 x 7/16
  • 7/16 x 9/16
  • 11/16 x 13/16
  • 3/8 x 9/16
  • 1/8 x 1/4
  • 1/4 x 3/8
  • 1/2 x 5/8
  • 5/8 x 3/4

Silicone O-Rings

Silicone is the common name for polydimethylsiloxane, an inorganic polymer based on quartz sand. This food-safe polymer is incredibly versatile, though it offers less tensile strength and abrasion resistance than EPDM. Choose silicone O-rings for devices and situations that encounter extremely high or low temperatures, as its tolerance ranges from -67 to 482°F (-55 to 250°C). Our collection includes clear 60A durometer O-rings with a 1/16-inch cross section and the following inner and outer diameters in inches:

  • 7/32 x 11/32
  • 3/16 x 5/16
  • 5/16 x 7/16
  • 7/16 x 9/16
  • 3/8 x 9/16
  • 1/8 x 1/4
  • 1/4 x 3/8
  • 1/2 x 5/8

Global Supplier of OEM Components

Qosina is a leading global supplier of thousands of single-use OEM components for the medical and pharmaceutical industries. We operate a 95,000-square-foot climate-controlled facility with an ISO Class 8 Clean Room. Find over 5,000 non-sterile medical components in stock and ready to deliver inventory management solutions that keep your project on track and under budget. Request complimentary samples of most components for your team to test. Download 3D CAD models in a variety of formats to help your engineers adapt virtual designs and stay up to date on regulations. Other downloadable resources include comprehensive technical specifications, such as material safety and data sheets (MSDS), technical data sheets, material certification, and compatibility information on all products.