Generic Buna-N O-Ring [4-1/2" ID] [3/32" CS] (O-638)

A Buna-N O-ring helps create a dependable seal at a compatible larger circular connection, and this generic version is sized with a 4-1/2 inch inside diameter and 3/32 inch cross-section using the O-638 reference. When an O-ring with these dimensions becomes worn, flattened, or cut, the connection can lose the sealing support it should maintain.

The 3/32 inch cross-section gives this O-ring practical value because it offers a balanced sealing profile for larger applications that do not call for either an especially thin or especially heavy section. A properly selected O-ring helps support cleaner compression and contributes to more dependable sealing performance.

This type of part is especially useful when matching the original groove fit and seal profile in a larger-diameter assembly during maintenance. That keeps repair work accurate and more reliable.

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

• Buna-N O-ring with 4-1/2 inch ID and 3/32 inch cross-section
• Helps support dependable sealing in larger compatible applications
• Useful when exact dimensional replacement is needed
• Supports cleaner targeted maintenance and repair
• Improves fit confidence and sealing reliability