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NITI VENTURES

Precision engineering and sealing solutions for industrial applications
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Size Charts & Standards

Reference information for common industrial size systems and dimensional organization used in sealing selection.

What is an O-ring?

An O-ring is one of the most common sealing components used to prevent leakage between mating surfaces. It is typically specified by its ID and CS, along with the selected material and part number reference.

O-ring size guide showing ID and CS

How O-rings are typically specified

  • ID refers to the inside diameter.
  • CS refers to the cross-sectional thickness.
  • Standard size systems make selection easier across industries and OEM references.
  • Each listed size family below is connected to NITI part numbers from your workbook.
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Size families

Each box can open its own size page. The structure is ready so customers can move by standard family, while already linking every listed size to the worksheet data and NITI part numbers from your size chart workbook.

Need help matching a size to a NITI part number?

Share the standard reference, dimensional requirement, or application details and we can help narrow the most suitable starting options.

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