Chemyx Stainless Steel O-Ring Replacements

The following are O-ring sizes that are used with Chemyx Stainless Steel syringes. The Chemyx O-rings are made with a copolymer of butadiene and acrylonitrile, the Buna-N/Nitrile/NBR seals offer compression-set resistance and are designed to resist most oils, lubricants, and hydrocarbon fuels.

Our most popular syringe pump seals, the Buna-N, are effective from -22°F to 250°F (-30°C to 121°C), offer superior abrasion and tear resistance, and are best for heavy-duty industrial applications.

To learn more about Chemical Compatibility, we have prepared a guide for common syringe assemblies. These are only general guidelines; we recommend checking online resources to confirm compatibility with your specific media. The following is a thorough chemical compatibility resource here.

O-Ring Dimensions

O-rings made with any material with the following inner and outer diameters can be used with Chemyx Stainless Steel syringes.


Syringe SizeSyringe IDO-Rings IDO-Rings OD
6 mL9.53 mm1/4″3/8″
20 mL19.13 mm9/16″3/4″
50 mL28.60 mm15/16″1 1/8″
100 mL34.90 mm1 3/16″1 3/8″
200 mL43.96 mm1 3/4″1 15/16″
200 mL55.00 mm1 15/16″2 1/8″

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