Generic Buna-N O-Ring [3/4" ID] [1/8" CS] (O-398)

A Buna-N O-ring helps create a seal at a compatible circular sealing point, and this generic version is sized with a 3/4 inch inside diameter and 1/8 inch cross-section using the O-398 reference. When an O-ring with this profile becomes flattened, brittle, or damaged, the connection can lose the sealing performance it should maintain.

The 1/8 inch cross-section gives this O-ring practical value because it provides more sealing material than a thinner profile while preserving the intended inside diameter for the application. A properly selected O-ring helps support cleaner compression and contributes to more dependable sealing behavior.

This type of part is especially useful when the original application calls for a medium-profile seal and the dimensions need to be matched closely during service. That helps keep maintenance accurate and dependable.

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

• Buna-N O-ring with 3/4 inch ID and 1/8 inch cross-section
• Helps support dependable sealing in compatible applications
• Useful when exact O-ring profile matching matters
• Supports cleaner targeted maintenance and repair
• Improves fit confidence and sealing reliability