AN To NPT 90 Degree -12 x 3/4in

The AN to NPT 90 degree -12 x 3/4in adapter from Allstar Performance is an essential fitting for any serious automotive enthusiast or professional mechanic working with custom fuel, coolant, or hydraulic systems. This 90-degree elbow connector bridges two industry-standard thread types—AN (Army-Navy) fittings on one end and NPT (National Pipe Thread) on the other—making it indispensable for fabricating tight-tolerance fuel lines, brake systems, and transmission cooler circuits where space constraints demand compact routing. Whether you're building a fuel-injected LS swap, upgrading a carburetor feed line, or plumbing a custom cooling system, this adapter eliminates the need for multiple connectors and simplifies system integration in tight engine bays.

The -12 AN size designates a 3/4-inch hose connection on the AN side, while the NPT side matches standard 3/4-inch pipe threads found on most factory and aftermarket components. The 90-degree configuration allows fluid lines to turn without adding bulk or creating stress points that can lead to leaks under pressure. Allstar Performance's machined aluminum construction with precision porting ensures minimal turbulence and maximum flow efficiency—critical factors when fuel delivery or coolant circulation must remain unobstructed. The crimp-compatible AN end accepts standard push-lock hose or braided stainless lines, while the NPT end secures directly into component ports with traditional thread sealant, creating a permanent, pressure-rated seal that withstands high-vibration racing environments or daily-driver reliability demands.

Mechanics and fabricators benefit most from this fitting when retrofitting older carbureted vehicles with modern fuel injection, upgrading brake proportioning valve plumbing, or custom-routing transmission lines in tight-clearance installations. Its compact 2.15-inch overall length and lightweight 0.16-pound design minimize clutter and won't add measurable weight to your system. The adapter is fully compatible with both braided stainless steel hose and traditional rubber lines when used with appropriate crimp fittings, and it meets automotive industry standards for pressure applications up to typical racing and street performance levels. Installation requires only basic wrench work: secure the NPT end with two wrenches to prevent spinning, then attach your AN-sized hose via compression fitting or crimp collar.