Generic Buna-N O-Ring [7-7/8" ID] [1/8" CS] (90-423-6139)

A Buna-N O-ring helps create a seal at a compatible large circular connection, and this generic version is sized with a 7-7/8 inch inside diameter and 1/8 inch cross-section using the 90-423-6139 reference. When an O-ring in this profile becomes brittle, cut, or flattened, the assembly can lose the sealing support it should maintain.

The 1/8 inch cross-section gives this O-ring practical value because it provides a dependable medium-profile seal for larger circular groove designs. A properly selected O-ring helps support cleaner compression and contributes to more dependable sealing performance where exact dimension matching matters.

This type of part is especially useful during service work where original seal measurements are known and need to be matched closely for reliable reassembly. That keeps maintenance more 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 7-7/8 inch ID and 1/8 inch cross-section
• Helps support dependable sealing in larger compatible applications
• Useful when exact profile matching matters
• Supports cleaner targeted maintenance and repair
• Improves fit accuracy and sealing confidence