4an Male to 16mm x 1.50 Male Fitting

The EARLS 4 AN Male to 16mm x 1.50 Male Fitting (AT9919BFJERL) is a precision adapter designed for high-performance fuel, oil, and coolant line systems in modified vehicles and race applications. This fitting bridges two industry-standard thread formats, allowing seamless integration between AN-spec components and metric 16mm x 1.50 male ports commonly found on engine blocks, fuel rails, and aftermarket manifolds.

Constructed from aluminum alloy, this 4 AN to 16mm x 1.50 adapter features precision machining for reliable connections. The compact design minimizes the packaging footprint in tight engine bays, making it suitable for vehicles with modified cylinder heads or custom intake manifolds. The anodized finish resists corrosion from fuel, oil, and coolant contact.

This fitting is ideal for engine builders, performance shops, and enthusiasts looking to transition legacy or international components into AN-standardized fuel and cooling systems. Its direct male-to-male thread engagement eliminates unnecessary adapters that can trap debris and create weak points in pressurized systems.