#4 Female Swivel to 1/4mpt Fitting

The FRAGOLA #4 Female Swivel to 1/4 NPT Male Straight Adapter Fitting is a precision-engineered hydraulic and pneumatic line connector designed for applications requiring reliable, leak-free connections between AN (Air Force-Navy) swivel fittings and standard NPT (National Pipe Taper) ports. Constructed from aluminum with blue anodized corrosion protection, this straight adapter delivers the durability and performance demanded in high-pressure fluid transfer systems, fuel delivery, coolant circulation, and pneumatic applications across industrial, automotive, and equipment maintenance environments.

The #4 AN female swivel design allows for angular adjustment without twisting the connected hose or tube, reducing installation stress and extending line service life. The 1/4-inch male NPT port accepts standard NPT-threaded components, creating a compact transition between different fitting standards on the same assembly. Blue anodized aluminum provides corrosion resistance suitable for engine bays, outdoor equipment, and systems exposed to moderate moisture. The straightforward geometry minimizes turbulence in fluid flow and simplifies integration into existing manifold layouts or point-to-port connections.

This fitting serves technicians, engine builders, hydraulic system integrators, and equipment maintenance professionals who need to bridge AN and NPT standards in a single robust component. Whether retrofitting a fuel system, assembling a coolant circuit, or adapting a pneumatic control line, the FRAGOLA adapter eliminates the need for multiple secondary fittings and reduces potential leak points. The swivel female end absorbs minor misalignments during installation, while the NPT male port ensures a tight, tapered seal when paired with appropriate thread-sealant compound.