EVIL ENERGY 6AN Male Flare to 3/8" NPT Pipe Fitting Adapter

EVIL ENERGY AN6 male flare to 3/8" NPT straight adapter is a black-anodized 6061-T6 aluminum fitting that joins AN6 flare lines to 3/8" NPT female pipe threads (sold as a pack of four). This set of four straight adapters converts an AN6 (9/16-18 UNF) male flare connection to a 3/8" NPT tapered pipe thread. Machined from aircraft-grade 6061-T6 aluminum and finished with a hard black anodize, these fittings are made for automotive and industrial low- to moderate-pressure fluid systems where a secure, compact transition between AN and NPT connections is needed.

How does this adapter create a leak-resistant connection?

The AN side seals with a 37° flare seating surface while the NPT side uses a 60° tapered pipe thread for interference sealing. Because pipe threads seal by taper compression, we recommend using thread sealant or PTFE tape on the NPT threads to ensure a reliable seal.

• AN6 side: 37° flare seating angle for metal-to-metal seal
• NPT side: 60° tapered threads; needs sealant or PTFE tape
• Hand-tighten then wrench-finish for correct compression

What materials and finish does it use, and why does that matter?

Each adapter is CNC-machined from 6061-T6 aluminum, chosen for its strength-to-weight ratio and corrosion resistance. A hard black anodized surface improves wear resistance and adds a protective, non-conductive finish suited to engine-bay and exterior applications.

• 6061-T6 aluminum: lightweight and durable
• Black anodize: corrosion and abrasion protection
• CNC-machined: consistent thread and sealing geometry

Where can I use these AN6 to 3/8" NPT adapters?

They are suitable for many automotive and industrial fluid systems where AN lines need to interface with pipe-threaded components. Typical uses include fuel plumbing, coolant fittings, and power steering lines in both custom builds and repairs.

• Fuel systems: return or feed lines with proper sealing
• Cooling and transmission plumbing where NPT ports are present
• Power steering and low- to moderate-pressure hydraulic lines

How do I install and maintain these fittings safely?

Installation is straightforward: apply PTFE tape or thread sealant to the NPT threads, thread into the mating port until hand-tight, then finish with a wrench. Avoid over-tightening to prevent thread damage or distortion of the flare seating surface; inspect periodically for leaks and re-torque as needed.

• Use PTFE tape/sealant on NPT threads to prevent leaks
• Tighten with wrench; do not overtighten AN flare seating
• Inspect connections after first run and periodically thereafter

Who is this for These adapters are aimed at mechanics, fabricators, and enthusiasts who need a reliable transition between AN6 flare hoses and 3/8" NPT ports. If you build or repair fuel, coolant, or low-pressure hydraulic systems and require a compact, reusable adapter with corrosion-resistant finish, this 4-pack from EVIL ENERGY offers a practical, professional-grade option.

FAQ

Q: Does the NPT side need sealant?

A: Yes. Use PTFE tape or pipe thread sealant on the 3/8" NPT threads to prevent leakage.

Q: Are these fittings reusable?

A: Yes. The anodized 6061-T6 aluminum adapters can be removed and reused if threads and flare seats remain undamaged.