Twisted Choppers Micro Flat Under Trans Oil Tank Cap With Weld In Bung
The Twisted Choppers Micro Flat Under Trans Oil Tank Cap gives custom oil tank builds a clean, low-profile access point right where the builder positions it. Its weld-in bung design handles any tank configuration, and the compact form factor makes it equally suited for transmission and oil tank setups.
Key Features
- Low-profile flat aluminum cap for custom oil and transmission tank applications
- Weld-in mild steel bung for flexible placement in any custom tank
- O-ring seal for secure, leak-free closure
- 1/8-27 NPT hole tapped in center for connecting a vent line or leaving plugged
- Non-vented cap design suited for oil and transmission tank use
- Made in the USA
Technical Specifications
- Cap Profile: Flat (low-profile)
- Material: Aluminum cap / mild steel bung
- Thread Size: 1″-14
- Bung Height: 1.03″ overall / .875″ to flange
- Bung Outside Diameter: 1.25″
- Bung Inside Diameter: 1″
- Vent Port: 1/8-27 NPT hole tapped in center
- Seal: O-ring
- Origin: Made in the USA
Fitment Notes
- Requires welding the mild steel bung into a custom oil or transmission tank; not a bolt-on replacement for OEM-style caps
- The 1/8-27 NPT center hole can be fitted with a vent tube fitting or left plugged depending on the application
- Suitable for bobbers, choppers, custom hardtails, and any build requiring a non-vented oil or trans tank access cap





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