#12 Tube Nut Black

The #12 Tube Nut Black from FRAGOLA is a precision AN fitting designed for high-pressure fluid transfer systems in automotive, aerospace, and industrial hydraulic applications. This black anodized aluminum component serves as a critical compression fitting that secures 3/4-inch tubing to AN-compatible ports, ensuring leak-free connections under demanding operating conditions. Technicians and engineers rely on tube nuts to create reliable, repeatable joints in fuel systems, brake lines, coolant circuits, and custom hydraulic installations.

Constructed from lightweight aluminum with black anodized finish, the #12 Tube Nut combines corrosion resistance with minimal weight—critical for performance-oriented builds where every ounce counts. The AN-standard 12-size designation corresponds to a 3/4-inch tube outer diameter, delivering a secure compression seal through a precisely engineered bite ring and ferrule design. Black anodizing not only protects against oxidation and corrosion in harsh environments but also provides a professional aesthetic that integrates seamlessly into custom engine bays, fuel systems, and visible hydraulic assemblies.

Professionals installing or upgrading AN-compliant fluid systems—from performance street machines to competition race cars—depend on FRAGOLA's precision-manufactured tube nuts for consistent, repeatable results. Installation requires matching the tube nut size to your tubing diameter and compatible AN adapter ports; the #12 designation confirms compatibility with 3/4-inch tubing and standard #12 AN ports. Whether replacing worn fittings, rebuilding fuel or coolant circuits, or constructing custom high-pressure lines, this individual tube nut delivers the durability and reliability that demanding applications require.