Easy Turn Fill Cap Bolt-On Bung Replacement O-Ring, .103 Inch Thick Buna Material
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Bolt-On Bung O-Rings
Choose your size.
Replacement Buna O-Rings and Buna flange gaskets are available for all of the signature Pro-werks Easy Turn Fill Caps and Bolt-On Bungs
Be sure to check out the entire line up - Billet aluminum Easy Turn Fill Caps are a Pro-Werks specialty.
Great caps. Great colors.
These bungs utilize the popular non vented Easy Turn Fill Caps that are available variety of Pro-Werks Brilliance anodized colors or beautifully Micro-polished aluminum finish - the finishes are impeccable.
The right size matters.
Easy Turn Fill Caps come in many sizes and are packaged as complete assemblies with your choice of one of the many versatile mounting options, or each component is also available separately.
Both the Cap and Bung are precision CNC machined from billet aluminum, right here in the USA.
Finish Your Tank
We also offer a full line of weld plumbing bungs to complete your tank project.
Click the images below to view all the options.
Q: What should I use to lubricate the Buna O-ring?
A: Applied periodically, a light coating of Dielectric grease has proven to work well as an O-ring lubricant.
Q: Is Buna rubber compatible with my fluid?
A: Buna is a synthetic rubber compound suitable for use with most fluids. Buna components may need to be replaced by a material compatible with the specific chemistry of some fluids.