Filler Cap Polished with Weld-In Steel Bung Large

The Filler Cap Polished with Weld-In Steel Bung Large is a critical component for custom fabrication projects requiring a secure, leak-proof access point for fluid reservoirs. Whether you are building a custom fuel cell, oil tank, or coolant expansion tank, this kit provides a professional-grade solution for adding a high-flow fill port. It is designed for racing and performance applications where durability and accessibility are paramount.

This kit features a 3-inch opening that facilitates rapid filling and easy inspection of internal fluid levels. The assembly consists of a weld-in steel bung paired with a precision-machined aluminum threaded cap, ensuring a robust seal under pressure. The polished finish on the cap provides a clean, professional aesthetic while the heavy-duty steel bung ensures a permanent, high-strength bond to steel tanks and reservoirs.

Ideal for fabricators and performance enthusiasts, the Filler Cap Polished with Weld-In Steel Bung Large is engineered for weld-on installation on steel surfaces. Its large diameter makes it particularly effective for high-volume systems that require frequent maintenance or rapid refueling. When searching for specifications or looking to buy a reliable bung and cap kit, this Allstar Performance unit stands out for its material compatibility and ease of installation.