Get Race-Proven, No-Leak Connections with Fragola O-Ring Boss Fittings and Adapters

Fragola O-Ring Boss (ORB) Direct-Fit Fittings and Adapters deliver uncompromising sealing, durability, and flexibility for today’s high‑performance fuel, oil, cooling, and hydraulic systems. 

The ORB fittings convert various tapered and NPT port types into more reliable AN connections, eliminating the problems that come with using pipe threads and sealant. Each fitting seals at the port with a precision‑fitted O‑ring—not on the threads—ensuring repeatable, leak‑free performance in high‑pressure, high‑vibration environments.

Machined from aerospace‑quality aluminum, Fragola ORB fittings maintain optimal flow in a wide range of configurations like ORB‑to‑AN, ORB‑to‑ORB, AN-to-metric, AN-to-pipe thread, and more. They are offered in straight or 90-degree angles to allow builders to route lines efficiently—especially in tight quarters and when easy serviceability is crucial. Radius‑style ORB fittings further reduce restriction at the inlet, making them ideal for fuel and oil systems where flow matters most.

Common uses for ORB fittings and adapters include:
• EFI fuel rails
• Carb fuel inlets
• Fuel pressure regulators
• Power steering pumps and rack and pinion assemblies
• Oil coolers and remote filter mounts
• Dry sump and wet sump oiling systems 

Most Fragola O-Ring Boss Direct-Fit Fittings and Adapters are finished in durable black anodizing, although some are also available blue anodized or chrome-plated. 

VIEW ALL THE FRAGOLA O-RING BOSS DIRECT-FIT FITTINGS AND ADAPTERS AVAILABLE