Billet Proof® Ribbed Gas Cap with Bung - Brass Cap, Steel Or Aluminum Stepped Flanged Tophat Bung

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All you need to do is weld it in and fill it up!


 • Easily welds to any STEEL OR ALUMINUM tank.

 • Machines Brass Cap - Machined from a solid piece of brass.

 • Non-Vented - Cap will have to be drilled out if a vented cap is needed.

 • Steel or ALuminum Bung - Machined from D.O.M steel OR 6061 Aluminum and stepped to make welding a breeze. Just drill a 1-1/2" hole and drop it in.

 • 1/8" Buna-N O-Ring - Temperature range -35 to +250 F.  Durometer hardness is A70.

 • Also available with an Aluminum Cap.

 • MADE in the USA!


Cap ONLY:                  

OD= 1-5/8"              

Height (Including Threads)= 3/4"

Knurled Edge= 1/8"

Thread Pitch= 1-1/4"-12


Bung ONLY:

OD= 1-5/8" 

Height= 3/8”

Thread Pitch= 1-1/4"-12





Brass Cap

Buna-N Seal

Steel or Aluminum Bung


Will fit in any tank that is able to accommodate the above dimensions.     

1 Review Hide Reviews Show Reviews

  • 5
    Solid, great quality, welds easily

    Posted by Basan MetalWorks on 13th May 2019

    Liked it so much I bought another, I would and have recommended Billet Proof products.