A Buna-N O-ring helps create a seal at a compatible large circular sealing point, and this generic version is sized with a 6-7/8 inch inside diameter and 1/4 inch cross-section using the O-679 reference. When a large heavy-profile O-ring becomes worn, cut, or compressed, the assembly can lose the sealing support it should maintain across the connection.The 1/4 inch cross-section gives this O-ring practical value because larger sealing surfaces often need more material than a lighter profile can provide. A properly selected O-ring helps support cleaner groove fill and contributes to more dependable sealing performance where a substantial cross-section is required.This type of part is especially useful during service work where a larger original seal with a heavier profile must be matched closely to restore reliable compression. That makes 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 6-7/8 inch ID and 1/4 inch cross-section Helps support dependable sealing in large compatible assemblies Useful when a heavier seal profile is required Supports cleaner targeted maintenance and repair Improves fit accuracy and sealing confidence
![Generic Buna-N O-Ring [6-7/8" ID] [1/4" CS],O-679 (O-679)](https://cdn.shopify.com/s/files/1/1751/9347/files/90-423-5441_XL.jpg?v=1713843896&width=480)
