Collection: Filler Cap & Weld Bung Assemblies

Speedflow designed and created this cap over 20 years ago, and it has since been copied and replicated worldwide!

This non-vented cap features an internal O-ring that seals securely, providing a reliable hand-tightened lock. The ergonomic finger grips make for easy operation.

Whether you're fabricating a tank, need an oil filler, or have another special application, we have a cap that’s perfect for your needs!

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