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Made in the USA

Pro-werks Remote Mount Aluminum Filler Cap Bung

Sale price $55.99 USD
Part # C73-792
Select Bung Style
Select Fill Cap Size
Select Bung Color

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Specifications

2 Inch Remote Mount Bung, 2 Inch Hose
1-1/2-12 Straight Thread
4 on 2.75 in. Bolt Circle
9/16 in. Bung Height

2 Inch Recessed Remote Mount Bung, 2 Inch Hose
Fits 2 in. Fill Cap
1-1/2-12 Straight Thread
6 on 4.75 in. Dia. Bolt Circle
(Cap Replacement O-Ring is C73-769)

2-3/4 Inch Remote Mount Bung, 2 Inch Hose
2-1/4-10 Straight Thread
4 on 3.25 in. Dia. Bolt Circle
11/16 in. Bung Height

2-3/4 Inch Recessed Remote Mount Bung, 2 Inch Hose
2-1/4-10 Straight Thread
6 on 5.125 in. Dia. Bolt Circle
This Bung will not accept a Lanyard Boss Cap.
(Cap Replacement O-Ring is C73-788)


Remote Recessed Remote Bungs

Pro-werks Fill Cap Bungs are available separately without the cap. These bolt-on style aluminum bungs come in several types and sizes, and do not require welding. The integrated hose nipple features a retention barb, providing positive sealing of the hose connection.

Properly sized for the "radially squeezed" O-ring standard of the signature Pro-werks Easy Turn Fill Cap.

Select anodized colors are available and include mounting hardware - so you won't need to run all over town looking for it!

Remote fluid filling is made easy with the Pro-werks Recessed Remote Easy Turn Fill Assembly. This unique assembly provides an attractive flush mount solution for a locating a filling point in a panel, allowing for fluid transfer thru a hose to the tank.

This Recessed version is work of art and is right at home for any show quality installation.

The selection of weld-able bungs is also available; including several different heights in your choice of Steel, Aluminum or Stainless Steel materials. Backed by The Chassis Shop's Satisfaction Guarantee.

Note: Welding should always be performed by a qualified welder.

Watch Product Videos ⏵


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!

Four machined aluminum fuel cell caps with scalloped grip edges, shown in polished silver, black, red and blue finishes


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.

Set of four black anodized fuel fill caps with scalloped grip edges, shown in graduated sizes on a white background

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!

Red anodized cap with lobed grip flange, black O-ring seal and "Made in the USA" engraving, held in a hand for scale


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


Frequently Asked Questions


Q: How much do I need to tighten a fill cap?
A: It is not necessary to bottom the fill cap into the bung−just adequately seat the O-ring. The radial squeeze action on the O-ring creates a positive seal and helps prevent the cap from coming loose.


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 many fluids. Buna components may need to be replaced by a material compatible with the specific chemistry of some fluids.


Marketing banner showing a stack of Pro-Werks fill cap brochures with blue, red, silver and black finger-notch caps, beside text inviting readers to view it

Product Videos

Two anodized fuel fill caps, one red and one blue, held in a hand, top view showing scalloped grip edges and a printed logo Video still of a presenter behind a table displaying aluminum and plastic fuel cells with a row of colored filler caps Blue anodized aluminum fuel fill cap with lobed grip, installed on a welded sheet aluminum tank sitting on a fixture table Round aluminum filler cap shown as a weld in bung welded into a flat aluminum plate, held in gloved hands, with TIG weld beads visible Aluminum canister and green-topped grip tool on a drilled fixture plate, beside a blue anodized cap marked Made in the USA, a flat file and pliers
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