Generic O-Ring [17-3/16" ID] [5/16" CS] O-339 (O-339)

An O-ring helps create a dependable seal at a compatible very large circular connection, and this generic version is sized with a 17-3/16 inch inside diameter and 5/16 inch cross-section using the O-339 reference. When a large heavy-profile O-ring becomes worn, flattened, or damaged, the assembly can lose the sealing support it should maintain around the full circumference.

The 5/16 inch cross-section gives this O-ring practical value because larger assemblies often need more sealing mass than a standard profile can provide. A properly selected O-ring helps support cleaner groove fill and contributes to more dependable sealing performance in broad circular applications.

This type of part is especially useful during major maintenance on large lids, housings, or vessel-style assemblies where exact size and profile matching matter to dependable closure. That keeps repairs more accurate and more reliable.

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

• O-ring with 17-3/16 inch ID and 5/16 inch cross-section
• Helps support dependable sealing in very large applications
• Useful when a heavy seal profile is required
• Supports cleaner targeted maintenance and repair
• Improves fit confidence and sealing reliability