Generic Buna-N O-Ring [3-1/8" ID] [1/8" CS] (O-646)

A Buna-N O-ring helps create a dependable seal at a compatible circular connection, and this generic version is sized with a 3-1/8 inch inside diameter and 1/8 inch cross-section using the O-646 reference. When an O-ring in this profile becomes flattened, brittle, or cut, the connection can lose the sealing support it should maintain.

The 1/8 inch cross-section gives this O-ring practical value because it provides a fuller sealing profile than a thin-section alternative while still fitting many standard groove designs. A properly selected O-ring helps support cleaner compression and contributes to more dependable sealing performance.

This type of part is especially useful during maintenance work where the original dimensions are known and the replacement needs to match both diameter and profile closely. That helps keep repairs accurate and more dependable.

Installed in the proper application, this O-ring helps support dependable sealing and contributes to cleaner overall assembly integrity.

• Buna-N O-ring with 3-1/8 inch ID and 1/8 inch cross-section
• Helps support dependable sealing in compatible applications
• Useful when exact dimensional replacement is needed
• Supports cleaner targeted maintenance and repair
• Improves fit accuracy and sealing confidence