Generic Buna-N Square Ring [2-5/8" ID] [2-7/8" OD] (SM909)

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A Buna-N square ring helps create a seal at a compatible circular connection where a square-profile seal is required instead of a standard round O-ring, and this generic version is sized with a 2-5/8 inch inside diameter and 2-7/8 inch outside diameter using the SM909 reference. When a square-profile seal becomes worn, compressed, or damaged, the assembly can lose the sealing support it should maintain.The square-ring profile gives this part practical value because some groove designs are built around a flat-sided sealing shape rather than a round cross-section. A properly selected square ring helps support cleaner seating and contributes to more dependable sealing performance in the intended application.This type of part is especially useful during maintenance where exact seal shape and dimensional matching matter more than broad interchangeability. That helps keep the repair accurate and more dependable.Installed in the proper application, this square ring helps support dependable sealing and contributes to cleaner overall assembly integrity. Buna-N square ring with 2-5/8 inch ID and 2-7/8 inch OD Helps support dependable sealing in square-profile applications Useful when exact seal shape and sizing matter Supports cleaner targeted maintenance and repair Improves fit confidence and sealing reliability Show more