#12 X 1-1/16-12 (#12) Radius O-Ring Fitting

The #12 X 1-1/16-12 (#12) Radius O-Ring Fitting by FRAGOLA is a precision adapter designed for high-pressure fluid transfer applications in automotive, aerospace, and industrial hydraulic systems. This straight-through male-to-male AN fitting connects two #12 AN ports with a secure o-ring seal, eliminating the need for separate sealing tape or thread sealant. Built for reliability in demanding environments, this fitting is essential for custom fuel systems, brake lines, and power steering installations where leak-free performance is non-negotiable.

Constructed from aluminum and finished in blue anodized coating, the #12 X 1-1/16-12 (#12) Radius O-Ring Fitting provides both corrosion resistance and lightweight durability. The radius o-ring design uses a pre-installed elastomer seal that creates a metal-to-metal contact point, ensuring consistent, vibration-resistant connections that maintain integrity under pressure cycling and thermal fluctuation. The aluminum body reduces system weight while the anodized finish protects against oxidation and extends service life in engine bays and exposed installations.

Professionals and enthusiasts building custom hydraulic systems—including race car fuel delivery, performance braking upgrades, and aircraft fuel systems—rely on FRAGOLA fittings for their precision engineering and proven dependability. The #12 AN designation indicates compatibility with industry-standard -12 hose and port specifications, making this adapter ideal for connecting rigid or braided lines in point-to-point runs. Installation is straightforward: hand-tighten and then use a wrench to snug the fitting firmly without over-tightening, allowing the o-ring to seat properly and create a sealed, leak-free connection.