Easy Turn Fill Cap with Aluminum Bolt-On Bung
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1-5/8 Inch Fill Cap with Bolt-On Bung
1-1/4-12 Straight Thread
4 on 2 in. Dia. Bolt Circle
9/16 in. Bung Height
(Cap Replacement O-Ring is C73-749 & Bung Replacement O-Ring is C73-748)
2 Inch Fill Cap with Bolt-On Bung
1-1/2-12 Straight Thread
4 on 2.25 in. Dia. Bolt Circle
9/16 in. Bung Height
(Cap Replacement O-Ring is C73-769 & Bung Replacement O-Ring is C73-768)
2-3/4 Inch Fill Cap with Bolt-On Bung
2-1/4-10 Straight Thread
5 on 3.125 in. Dia. Bolt Circle
11/16 in. Bung Height
(Cap Replacement O-Ring is C73-788-A & Bung Replacement O-Ring is C73-789)
Bolt-On Bung and Cap Assembly
Fitted with the popular non vented Easy Turn Fill Cap, featuring positive grip finger notches that are easy to get a hold of. The 6061-T6 billet aluminum cap is CNC machined into a lightweight, attractive design with quick-starting coarse threads and positive sealing "radially squeezed" Buna O-Ring – which also holds the cap secure.
Great caps. Great colors.
The right size matters.
Proudly Made in the USA
Customer Comments:
– Randy Davis, Owner of OldSkoolFab, Inc.
Finish Your Tank
We also offer a full line of weld plumbing bungs to complete your tank project.
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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 most fluids. Buna components may need to be replaced by a material compatible with the specific chemistry of some fluids.