Generic Buna-N O-Ring [2-1/8" ID] [3/16" CS] (O-4)

A Buna-N O-ring helps create a seal at a compatible circular connection, and this generic version is sized with a 2-1/8 inch inside diameter and 3/16 inch cross-section using the O-4 reference. When a heavier-profile O-ring becomes worn or flattened, the assembly can lose the sealing performance it should maintain.

The 3/16 inch cross-section gives this O-ring practical value because some larger sealing points need a fuller profile to provide the intended compression and contact area. A properly selected O-ring helps support cleaner fit and contributes to more dependable sealing in applications that call for a heavier section.

This type of part is especially useful when original equipment specifications require a thicker seal rather than a lighter-profile alternative. That helps keep replacement work accurate and more dependable.

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

• Buna-N O-ring with 2-1/8 inch ID and 3/16 inch cross-section
• Helps support dependable sealing where a thicker profile is required
• Useful when exact O-ring profile matching matters
• Supports cleaner targeted maintenance and repair
• Improves fit accuracy and sealing confidence