Pro-werks Easy Turn Filler Cap with Aluminum Remote Mount Bung
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Remote Mount Filler Cap Specifications
2 Inch Cap, 2 Inch Hose, Remote Bung
1-1/2-12 Straight Thread
Cap Weight: 3.32 oz.
4 on 2.75 in. Dia. Bolt Circle
9/16 in. Bung Height
(Cap Replacement O-Ring is C73-769)
2-3/4 Inch Cap, 2 Inch Hose, Remote Bung
2-1/4-10 Straight Thread
Cap Weight: 3.32 oz.
4 on 3.25 in. Dia. Bolt Circle
11/16 in. Bung Height
(Cap Replacement O-Ring is C73-788)
Easy Turn Fill Cap Advantages
The lightweight, non-vented cap features positive grip finger notches that are easy to get a hold of. Prime 6061-T6 billet aluminum is precision CNC machined into a lightweight, attractively designed cap; featuring quick-start coarse threads. Each screw on Cap is fitted with a Buna O-ring; positive sealing and "radially squeezed" to hold the cap secure. Backed by The Chassis Shop's Satisfaction Guarantee.
Remote Bung Filler Cap Assembly
Remote fluid filling is made easy with the Pro-werks Remote Easy Turn Fill Assembly. This unique assembly provides an attractive mount solution for a locating a filling point, allowing for fluid transfer thru a hose to the tank. The integrated hose nipple features a retention barb, providing positive sealing of the hose connection. Available in several combinations to meet your installation requirement
The precision CNC machined aluminum bung is Silver Anodized for lasting durability and includes mounting fasteners. The Pro-werks Easy Turn Fill Cap to also be purchased in addition, enabling you to pull together a complete assembly with the right color combination for your project.
The selection of weld-able bungs is also available; including several different heights in your choice of Steel, Aluminum or Stainless Steel materials.
Note: Welding should always be performed by a qualified welder.
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Great Filler Caps - Great Colors
To compliment the color coordination of your project, the caps are finished off in Pro-Werks Brilliance anodized colors in your choice of Black, Red, Blue, or beautifully Micro-Polished aluminum – the Pro-werks Jewelry Quality finishes are unmatched and impeccable!

The Right Size Fill Cap 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.

Proudly Made in the USA
Both the cap and bung are precision CNC machined light weight billet aluminum, right here in the USA.
Be sure to check out the entire line up - Billet aluminum Easy Turn Fill Caps are a Pro-werks specialty.
You can always count on Pro-Werks to do it right!

Customer Comments:
"I use your bolt on caps and bungs on my carbon fiber Cummins common rail valve covers. Love the quality. Thank you."
– Randy Davis, Owner of OldSkoolFab, Inc.
"I upgraded my fuel cell to an Easy Turn fill cap assembly. It wasn't long until all my friends did the same. Great product!"
– As shared with us at the PRI Show
Questions and Answers
How much do I need to tighten my fill cap?
What should I use to lubricate the Buna O-ring?
Is Buna rubber compatible with my fluid?
Pro Tips
Formula to calculate fluid capacity of a tank
Product Videos










