45 Alum #4flare/1/8in Pipe

The AEROQUIP 45 Degree Aluminum 4 AN Male to 1/8 Inch NPT Male Pipe adapter is a precision hydraulic and fuel line fitting designed for professional-grade automotive and powersport applications. This compact connector bridges AN (Army-Navy) and NPT (National Pipe Thread) standards, making it indispensable for custom fuel systems, turbo setups, supercharger installations, and aftermarket hydraulic line routing. Whether you're building a race-ready engine bay or upgrading a late-model performance platform, this adapter ensures reliable pressure containment across different thread specifications without leaks or compatibility headaches.

Constructed from lightweight aluminum, the 45-degree angle design maximizes space efficiency in cramped engine compartments while reducing stress on adjacent hoses and fittings. The 4 AN male thread accepts standard -4 hose and braided stainless-steel line assemblies, while the 1/8 NPT male outlet threads directly into OEM or aftermarket manifolds, sensors, and regulator ports. AEROQUIP's reputation for aerospace-grade durability means this fitting handles high-pressure fuel delivery and coolant bypass applications without weeping or failure, even under extreme underhood temperatures and vibration loads typical of forced induction or extended track use.

This adapter is essential for tuners and fabricators adapting late-model EFI fuel rails to custom reservoir systems, integrating aftermarket fuel pressure regulators, or plumbing catch-can and breather lines on ported valve covers. Mechanics working on supercharged or turbocharged builds will appreciate the compact footprint and the reliability that comes with a brand trusted in motorsports since the 1950s. At just 0.03 lbs, installation adds negligible weight while eliminating the need for costly custom-machined adapters or unreliable quick-disconnect solutions.