Generic Buna-N Square Ring [6-9/16" ID] [6-13/16" OD] (90-423-6135)

A Buna-N square ring helps create a seal at a compatible large circular connection where a square-profile seal is specified, and this generic version is sized with a 6-9/16 inch inside diameter and 6-13/16 inch outside diameter using the 90-423-6135 reference. When a square-profile seal becomes worn or compressed, the assembly can lose the sealing support it should maintain.

The square-ring format gives this part practical value because some larger sealing grooves are designed for flat-sided seal geometry rather than a standard round O-ring. A properly selected square ring helps support cleaner contact and contributes to more dependable sealing performance across the intended sealing surface.

This type of part is especially useful during service work where the original seal profile must be matched exactly to restore correct groove fit and compression. That makes repair work more accurate and more dependable.

Installed in the proper application, this square ring helps support dependable sealing and contributes to cleaner overall assembly performance.

• Buna-N square ring with 6-9/16 inch ID and 6-13/16 inch OD
• Helps support dependable sealing in larger square-profile applications
• Useful when exact seal shape and dimensions matter
• Supports cleaner targeted maintenance and repair
• Improves fit confidence and sealing reliability