1-5/8 in. SILVER FILL CAP WITH ALUMINUM WELD BUNG1-5/8 in. SILVER FILL CAP WITH ALUMINUM WELD BUNGCap and Weld-On Bung InstalledProudly Made In The USA
Quantity Your Price
1 $38.99

C73-738

1-5/8 in. SILVER FILL CAP WITH ALUMINUM WELD BUNG

1-1/4-12 Straight Thread
1-5/8 in. Outside Diameter Bung
1/2 in. Bung Height

Made in the USA

(Cap Replacement O-Ring is C73-749)



Q:

How much do I need to tighten a fill cap?

A:

It is not necessary to bottom the fill cap into the receiving bung. Adequately seating the O-ring to make a seal is all that is required. The radial squeeze action on the O-ring creates a strong seal and helps to keep the cap from coming loose.

 



Q:

What should I use to lubricate a Buna O-ring?

A:

A light coating of Dielectric grease works very well as O-ring lubricant.

 



Q:

What is Buna and is it compatible with my fluid?

A:

Buna is a universal composition synthetic rubber, a standard of plumbing related products because it is compatible with many fluids. Due to the complex chemistry of modern day performance oils and fuels, you may find it necessary to replace Buna components with a material that is compatible with the unique chemistry of your specific fluids.

 



Q:

How do I weld my bung properly?

A:

It is a good practice to apply several small, equally spaced tacks to minimize the potential for distortion. The bung should also be preheated and the weld should be kept small to reduce natural weld shrinkage.

 



Q:

The cap won't fit after welding my bung. How do I fix this?

A:

Minor distortion of the bung from improper welding can often be addressed by applying a small amount of fine grit lapping compound to the cap threads and turning the cap back and forth in the bung to resize the threads. Do not force the process, be patient and thoroughly clean both sets of threads after the desired fit is achieved.

 

1-5/8 in. Silver Fill Cap: C73-743
Inside Grip Diameter: 1.625 in.
Outside Grip Diameter: 1.970 in.
Height: 0.5 in.
Height: 0.312 in.
Thread: 1-1/4-12
Aluminum Weld-In Bungs: C73-747
Outised Diameter: 1.625 in.
Thread: 1-1/4-12
Height: 0.5 in.
Diameter: 1.5 in.
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