Filler Caps

Filler Cap and Bung Filler Cap and bung these are most commonly used for oil tanks or any other fluid container such as an overflow tank that does not need to be vented. We make a vented version of these filler necks as well. 1.250 x 12 threaded bung...

This is a vented version of our common Filler Cap and Bung. These caps use the same standard bung we have used for years. They have a small .040" hole for venting with a replaceable brass vent fitting installed on the inside to reduce liquid seepage...

Brass Filler Cap and Bung This filler cap and bung are most commonly used for oil tanks or any other fluid containers, such as an overflow tank that does not need to be vented.  We make a vented version of these filler necks as well.  This kit...

Solid brass filler cap with a tall weld in filler neck made of mild steel or aluminum. The brass filler cap in your choice of a vented or non vented version. The taller weld in filler bung in mild steel or aluminum can be cut down or used in it's full...

By popular demand we are now making a Brass version of our common Vented Filler Cap and Bung. These caps use the same standard bung we have used for years. They have a small .040" hole for venting with a replaceable brass vent fitting installed on the...

This kit includes all threaded fittings needed for proper function of an oil tank. This kit contains three 1/8 NPT fittings for your oil lines (feed, vent, and return) it also contains a threaded filler cap and bung. All weld in parts are available in...

A slightly different taller version of our standard filler cap andweld in bung. These are a weld in filler neck made of mild steel and come with an aluminum filler cap in your choice of vented or non vented version. The taller weld in filler bung can be...

This is our new brass gas cap for fitment on all HD models from 1986 on up to present. The top is made of solid brass and comes with the same O-ring and thread used by the factory. They feature a knurled outer edge for good looks and extra grip for...

By popular demand we are now making a Brass version of our common Filler Cap. These can be used for oil tanks or any other fluid container that requires a non vented cap. These caps use the same standard bung we have made for years the 1 1/4 x 12 thread...

By popular demand we are now making a Brass Vented version of our common Filler Cap and Bung Can be used for gas tanks oil tanks or any other fluid container. These caps use the same standard bung we have used for years so if you want to upgrade to a...

These are our weld in filler bungs, used with all of our vented and non vented caps. 1 1/4" x 12 thread 1 3/4" flange OD 1 1/2" stepped down OD Available in Mild Steel, Aluminum, or Stainless Steel Sold each

This is a different version of our ever popular filler bungs, these weld filler bungs are taller than our standard flanged ones for those who would like to stand the filler neck off of your tank a little higher. They are the same 1 1/4" x 12 thread pitch...

This is a replacement O-ring for all of our vented and non vented filler caps. Made from fuel and oil resistant rubber for a long service life. -sold each for $0.39

This is an OEM style weld in gas tank bung, the same one used on all of the later Harley Davidson Tanks. Permits the use of factory or the vast variety of aftermarket replacement gas caps on the market. The bung is made of mild steel and has the threads...

This is a 1/8" male NPT fitting with a brass screen/filter. We commonly use these for our filler caps to provide a vent but cut down on the amount of fluid seapage from having a vented hole in a fluid container. They are oil and fuel resistant for a long...