Fillcap Screw-on 3in Dia 12-Bolt Flange - Black

The Fillcap Screw-on 3in Dia 12-Bolt Flange in black anodized aluminum is a fuel cell filler cap assembly engineered for high-performance racing, off-road, and specialty vehicle builds. Designed for raised cell-mount fuel tanks with 12-bolt flange configurations, this component seals fuel systems under demanding conditions where reliability and secure containment are non-negotiable. From vintage muscle cars to modern drag racing platforms and tactical/military vehicle applications, this cap assembly serves operators and builders who demand precision engineering and proven durability in fuel system management.

Manufactured by AEROMOTIVE, a trusted name in fuel system technology, this screw-on filler cap features a robust 3-inch diameter design matched to standard 12-bolt flange fuel cell openings. The black anodized aluminum construction provides corrosion resistance and durability in harsh environments while maintaining structural integrity under vibration and pressure cycling. The raised cell-mount configuration ensures proper clearance and fitment when integrated into tight engine bays or custom fuel cell installations, while the threaded screw-on design allows for quick fuel access without compromising system security during high-G maneuvers or off-road operation.

This fillcap is ideal for motorsports enthusiasts, fabricators, and operators managing specialized vehicle fuel systems where OEM solutions are unavailable or incompatible. Installation is straightforward on any fuel cell featuring a standard 12-bolt flange opening with raised cell mounting. Compatibility with aluminum fuel cells and aftermarket racing tanks is confirmed; verification of your fuel cell's flange diameter (3 inches) and bolt pattern (12-bolt) ensures proper fit. The compact 6 x 5.25 x 7.5-inch footprint and lightweight 1.7-pound design minimize mass penalty while delivering the sealed containment performance required in competition and off-road environments.