ColorFittings 1/8" BSPT to 3AN Adapter Fittings are are precision-engineered to seamlessly convert 1/8" BSPT ports to 3AN flare connections, these adapters deliver a secure, leak-free solution for fuel, oil, coolant, boost reference, and pressure sensor plumbing.

Each adapter is CNC machined from 6061-T6 billet aluminum and finished with ColorFittings’ proprietary polishing and anodizing process for maximum strength, corrosion resistance, and long-term durability. These fittings are designed to withstand high pressure and high temperature environments commonly found in racing, street performance, marine, and aviation applications.

Our 1/8" BSPT to 3AN fittings feature precision-cut tapered BSPT threads for a tight mechanical seal (thread sealant recommended) and a true 37-degree AN flare seat for a proper, consistent seal when paired with ColorFittings products. Engineered for compatibility with E85, ethanol-based fuels, race fuels, pump gas, oil, coolant, and air systems, these adapters deliver dependable, leak-free performance in demanding fuel and fluid transfer applications. When combined with our nylon or stainless steel braided hose, they provide clean routing and professional-grade plumbing for compact fluid systems.

For best installation results, we strongly recommend using our AN Fitting Assembly Tools, which help prevent fitting damage and ensure proper hose and fitting alignment. Please reference our installation video and fitting guide for proper assembly techniques and torque recommendations.

Looking to complete your system? Explore our full range of AN fittings, metric adapters, braided hose, and fitting assembly tools.