AN Flare To ORB Adapter 3/4-16 (-8) to -4

The AN Flare To ORB Adapter 3/4-16 (-8) to -4 is a precision hydraulic and pneumatic fitting designed to connect AN8 male flare connections to -4 ORB (O-Ring Boss) ports. This adapter serves critical functions in high-performance fuel systems, brake lines, and pressurized fluid applications where reliable, leak-free connections are non-negotiable. Whether you're building a custom race engine fuel system, upgrading brake components, or assembling pneumatic equipment, this straight adapter bridges two industry-standard connection types seamlessly.

Manufactured by ALLSTAR PERFORMANCE from black anodized aluminum, this adapter combines durability with corrosion resistance while maintaining lightweight construction. The AN8 male flare end (3/4-16 thread pitch) connects to conventional AN-style tubing fittings, while the -4 ORB male port accommodates O-ring seal systems, which offer superior pressure retention and reduced vibration loosening compared to traditional flare seals. The straight configuration allows direct, in-line connections without spatial constraints, and the aluminum construction resists galvanic corrosion in mixed-metal systems while remaining affordable and easy to machine if custom modifications are needed.

Technicians, fabricators, and performance enthusiasts benefit most from this adapter when retrofitting systems that mix legacy AN flare plumbing with modern ORB-ported components, such as fuel pressure regulators, oil coolers, or custom manifolds. Installation is straightforward—apply appropriate thread sealant (PTFE tape or anaerobic sealant) to the male ORB end, thread into the receiving port by hand initially, then torque to manufacturer specifications using a wrench on the fitting body. Verify compatibility with your specific system pressure rating and fluid type before installation to ensure longevity.