EVIL ENERGY 6AN Male Flare to 1/4" NPT Pipe Fitting Adapter

EVIL ENERGY AN6 male flare to 1/4" NPT straight adapter — a durable aluminum 4-pack that converts a 6AN flare connection to a 1/4" NPT tapered thread for fuel, coolant, and steering plumbing.

This set of four adapters gives you a compact, corrosion-resistant option to join AN6 (9/16-18 UNF) flare fittings with 1/4" NPT pipe threads. Machined from 6061-T6 aluminum and finished in anodized black, each adapter seals at the AN flare face (37°) while the NPT end uses a tapered 60° thread. These fittings are commonly used in automotive fuel systems, cooling lines, and power steering plumbing where a transition from AN flare tubing to NPT threaded ports is required. For leak-free results on the NPT side, use thread sealant or PTFE tape.

How do I confirm compatibility with my lines and ports?

Check both the AN and pipe-thread sides before installation: the adapter uses a standard 6AN male flare (9/16-18 UNF) on one end and a 1/4" NPT tapered thread on the other. Verify mating parts for matching thread forms and diameters to avoid cross-threading or poor sealing.

• AN side: 6AN male flare, 9/16-18 UNF thread.
• NPT side: 1/4" tapered pipe thread, 60° sealing angle.
• Confirm port type (flare vs. pipe thread) on vehicle or component.
• Measure tubing outer diameter and thread pitch if unsure.

What materials and finishes are used, and why does it matter?

These adapters are machined from 6061-T6 aluminum and anodized black for improved surface hardness and corrosion resistance. The lightweight aluminum keeps fittings easy to handle while providing adequate strength for typical automotive fluid systems.

• 6061-T6 aluminum body for good strength-to-weight ratio.
• Anodized black finish for oxidation protection and cleaner appearance.
• Precision-machined flare face for reliable 37° sealing on AN fittings.
• Tapered NPT thread for pressure-rated pipe connections when sealed correctly.

How should I install and seal the NPT thread to prevent leaks?

The AN flare end seals by metal-to-metal contact at a 37° cone; the NPT side relies on tapered threads and must be sealed with a compound. Use PTFE tape or a pipe-thread sealant compatible with fuel or coolant to create a reliable seal on the 1/4" NPT side.

• Wrap 3–5 turns of PTFE tape clockwise on the NPT male threads.
• Or apply a fuel-rated thread sealant following manufacturer instructions.
• Tighten to hand-plus a wrench turn; avoid over-tightening aluminum threads.
• Pressure-test the system after installation to check for leaks.

Where are these adapters commonly used in vehicles and machinery?

These adapters bridge AN flare tubing and NPT threaded ports, making them ideal for conversions and repairs on aftermarket systems. Expect to find them in fuel delivery lines, coolant bypasses, return lines, and power steering plumbing where an AN hose must mate to a threaded port.

• Fuel system conversions between AN hoses and NPT ports.
• Cooling system fittings and bypass plumbing.
• Power steering lines and reservoir connections.
• Custom plumbing in motorsports and marine applications.

Who is this for? Mechanical hobbyists, performance tuners, and technicians who install or adapt fluid lines will appreciate this economical 4-pack of AN6-to-1/4" NPT adapters. If you need to convert a 6AN flare line to a 1/4" NPT threaded port with a lightweight, corrosion-resistant fitting, these EVIL ENERGY adapters provide a straightforward option — just remember to use proper thread sealant on the NPT side for leak-free operation.