EVIL ENERGY 4AN to 1/8" NPT Male 90 Degree Fitting Adapter

EVIL ENERGY's 4AN to 1/8" NPT 90° aluminum adapter is a compact elbow fitting that converts a 4AN flare connection to a 1/8" NPT male tapered thread in a durable anodized 6061-T6 package.

This two-piece kit supplies a right-angle adapter engineered for fuel, coolant, and power-steering plumbing where space is limited or a routed hose must turn sharply. The AN side seals on a 37° flare while the NPT side relies on tapered threads; the adapter’s black anodized finish improves corrosion resistance and gives a professional appearance. Designed for wrench installation, these fittings are intended for use in automotive and performance setups where reliable steering of fluids and compact routing matter.

How does this adapter connect 4AN plumbing to a 1/8" NPT port?

The adapter couples a 4AN (7/16-20 UNF flare) male flare fitting to a male 1/8" NPT tapered thread at a 90° angle, providing a secure mechanical joint on the AN side and a tapered-thread seal on the NPT side. Because NPT relies on thread tapering for the seal, using a thread sealant or PTFE tape at the NPT end is recommended for leak-free performance.

• AN side: 4AN (7/16-20 UNF) with standard 37° flare face.
• NPT side: 1/8" male tapered thread for pipe-style ports.
• Angle: 90° elbow for tight routing and clearance management.
• Installation: fit with appropriate wrench; use sealant on NPT threads.

What materials and finish are used, and why do they matter?

Each adapter is machined from 6061-T6 aluminum and finished with black anodizing. 6061-T6 balances strength and weight, while anodizing increases surface hardness and corrosion resistance—useful where fittings are exposed to fuel, coolant, or road elements.

• Base material: 6061-T6 aluminum for light weight and mechanical durability.
• Finish: black anodized surface for corrosion protection and consistent appearance.
• Precision machining: accurate thread and flare sealing faces for proper fitment.
• Pack count: sold as a two-piece set for multiple connections or spares.

Where will this elbow adapter typically be used?

Applications include fuel lines, cooling circuits, power steering plumbing, vacuum or sensor ports, and other low- to medium-pressure fluid pathways in automotive and motorsport installations. Its 90° orientation helps route lines around chassis components, engines, and brackets without kinking hoses.

• Common uses: fuel delivery, coolant bypasses, steering racks, and sensor taps.
• Best in: tight engine bays or confined areas needing a compact turn.
• Compatibility: works with flared AN hoses/fittings and tapered NPT ports.
• Installation tip: use PTFE tape or thread sealant on NPT to prevent leaks.

How should I install and maintain these fittings to avoid leaks?

Hand-start the threads to avoid cross-threading, then tighten with a wrench to snug, avoiding over-torquing. Because the NPT side seals via tapered threads rather than a flare face, add PTFE tape or a pipe-thread sealant before final assembly to ensure a leak-free joint. Periodically inspect for corrosion or loosening in high-vibration environments.

• Start threads by hand to ensure alignment and prevent damage.
• Apply PTFE tape or liquid thread sealant to the NPT male thread.
• Tighten with a proper-sized wrench; do not overtighten aluminum fittings.
• Inspect connections periodically, especially after initial run-in or vibration exposure.

Who is this for: This 2-pack of EVIL ENERGY 4AN to 1/8" NPT 90° adapters is aimed at automotive enthusiasts, professional mechanics, fabrication shops, and anyone doing custom fluid-routing work on engines, cooling systems, or steering assemblies. Choose it if you need a compact, reasonably corrosion-resistant elbow to adapt between AN-style flared lines and NPT-threaded ports, and plan to use a thread sealant on the NPT side for reliable performance.