Weld-in Bungs

Choose your material.

Weld-able Fill Cap Bungs

Pro-werks Fill Cap Bungs are available separately without the cap. This selection of weld-able bungs includes several different heights; available in Steel, Aluminum or Stainless steel materials.

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

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

The bolt-on style bung selection is also available, and does not require welding. Select anodized colors are available and also include mounting hardware - so you won't need to run all over town looking for it!

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.

Be sure to check out the entire line up - Billet aluminum Easy Turn Fill Caps are a Pro-Werks specialty.   Watch the Video below to learn more !

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-in plumbing bungs to complete your tank project.

Click the images below to view all the options.