Generic Buna-N O-Ring [3-7/8" ID] [3/16" CS] (O-72)

A Buna-N O-ring helps create a seal at a compatible circular sealing point, and this generic version is sized with a 3-7/8 inch inside diameter and 3/16 inch cross-section using the O-72 reference. When a heavier-profile O-ring becomes worn or compressed, the assembly can lose the sealing support it should maintain around the full connection.

The 3/16 inch cross-section gives this O-ring practical value because larger-diameter applications often need more sealing material than a thinner profile can provide. A properly selected O-ring helps support cleaner compression and contributes to more dependable sealing performance where a substantial profile is required.

This type of part is especially useful when restoring a seal that depends on a heavier section to match the original groove fill and compression design. That keeps replacement work accurate and more reliable.

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

• Buna-N O-ring with 3-7/8 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 confidence and sealing reliability