AN to NPT 45 Degree #4 x 1/8

The AN to NPT 45 Degree #4 x 1/8 adapter from Triple X Race Components is a precision hydraulic and pneumatic fitting designed for high-performance fuel, coolant, and air systems in racing and industrial applications. This adapter bridges two different thread standards—AN (Army-Navy) and NPT (National Pipe Thread)—allowing seamless integration between components that would otherwise be incompatible.

Manufactured from aluminum and finished in black anodized, the AN to NPT 45 Degree #4 x 1/8 combines lightweight design with corrosion resistance and durability in demanding environments. The 45-degree orientation allows for tight routing and space-constrained installations common in engine bays and chassis frames. The #4 AN male port, which corresponds to a diameter of 0.25 inches, connects to standard AN fittings and hoses, while the 1/8-inch NPT male port accommodates standard pipe thread components used in gauges, valves, and manifolds.

This fitting is ideal for fabricators, mechanics, and engine builders who require flexible system design without adapter stacking or custom machining. Common applications include fuel pressure gauge installations, coolant line branching, and pressurized air circuits, making it a versatile choice for various automotive and industrial setups.