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home > Pro-werks Easy Turn Fuel Cell Filler Cap with Lanyard Boss and 12 Bolt Aluminum Fuel Cell Bung > Pro-werks Easy Turn Fuel Cell Filler Cap with Lanyard Boss and 12 Bolt Aluminum Fuel Cell Bung
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Pro-werks Easy Turn Fuel Cell Filler Cap with Lanyard Boss and 12 Bolt Aluminum Fuel Cell BungBonus feature: The cap included in this assembly features a Lanyard Boss enabling it to accept the optional Lanyard Chain Kit 12 Bolt Fuel Cell Bung with 4 1 4 Inch Fill Cap 3 3 4 8 Straight Thread Cap Weight: 7. 86 oz. 12 on 5. 343 in. Dia. Bolt Circle 7 8 in. Bung Height (Cap Replacement O Ring is C74 788 A) Say Good Bye to Pry Bars Pro Werks provides another new improvement for racers and rodders; fuel cell users can now easily upgrade from the
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Bonus feature: The cap included in this assembly features a Lanyard Boss enabling it to accept the optional Lanyard Chain Kit

 

12 Bolt Fuel Cell Bung with 4-1/4 Inch Fill Cap

3-3/4-8 Straight Thread
Cap Weight: 7.86 oz.
12 on 5.343 in. Dia. Bolt Circle
7/8 in. Bung Height
(Cap Replacement O-Ring is C74-788-A)


Say Good-Bye to Pry Bars

Pro-Werks provides another new improvement for racers and rodders; fuel cell users can now easily upgrade from the less than desirable, original fuel cell manufacturer provided troublesome flip-latch style filler or bail cap - to the popular Easy Turn Fill Cap Assembly from Pro-Werks.


12-Bolt Fuel Cell Filler Cap Assemblies

This Fuel Cell Cap assembly is a simple bolt-on installation as a replacement for a Fuel Cell flip cap or right at home on new custom fuel tank fabrication. Compatible with aluminum, plastic and steel fabricated projects. Includes the necessary stainless mounting hardware with the Buna flange gasket.

These are direct replacements for original Fuel Cell filler assemblies commonly used on these popular brands of racing fuel cells: Jaz Fuel Cells, RCI Fuel Cells, Fuel Safe Fuel Cells, ATL Fuel Cells, Summit Racing Equipment Fuel Cells, Rhodes Race Cars Fuel Cells, Tim McAmis Fuel Cells, Jegs Fuel Cells, Speedway Motors Fuel Cells, Raceworks Fuel Cells, Pyrotect Fuel Cells, Aeromotive Fuel Cells, RJS Fuel Cells, and others (see dimensions for final compatibility verification).

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 with a special starter nose to accurately lead the cap into position - a very nice feature when you are taking care of business in the dark. Each screw on cap is fitted with a Buna O-ring; positive sealing and "radially squeezed" to hold the cap secure.

12 Bolt Version - installed

6 Bolt Version - installed

 

Popular Uses Include

  • Dragster Fuel Cell
  • Sprint Car Fuel Cell
  • Dirt Modified Fuel Cell
  • Stock Car Fuel Cell
  • Offroad Fuel Cell
  • Nascar Fuel Cell
  • SCCA Fuel Cell
  • Street Rod Fuel Cell
  • Custom Fuel Cell



How to Keep Your Cap Close

The signature Pro-Werks Fuel Cell filler cap has a starter nose to lead the cap into position and also includes a built-in lanyard boss, enabling the use of the optional lanyard chain to conveniently keep the cap close by - if you so desire. 



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 finishes are impeccable!

The bung of this assembly is also available in your choice of two anodized colors, Silver or Brilliance Black. The extensive selection of color combinations gives you the opportunity to match your individual style.



The Right Size Matters


Easy Turn Billet Aluminum Threaded 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


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.


PRO FABRICATION TIP: How to Calculate Tank Capacity

You can calculate how many gallons of fluid a tank will hold by dividing the total cubic inch volume by 231. As an example a basic rectangular shaped tank measuring 12"(L) x 12"(W) x 10"(H) = 1440 cubic inches. The next step is to divide the total volume of 1440 cubic inches by 231 = 6.23 gallons.

If your tank is an irregular shape, or has unique features, calculate the cubic inch volume of those areas also, then add or subtract the values to arrive at the total cubic inch volume of your custom fabricated tank.

Pro-werks Easy Turn Fuel Cell Filler Cap with Lanyard Boss and 12 Bolt Aluminum Fuel Cell Bung

Item no : 12818205379
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