Choosing the right 6AN to 1/4″ NPT fittings can improve reliability in fuel lines, cooling loops, and turbo kit installs. This guide highlights five compatible adapters, comparing materials, angles, seals, and typical applications. All options feature a 9/16-18 UNF 6AN straight flare on the AN side and a 1/4″ NPT thread on the other, with anodized aluminum bodies designed for durability in American automotive environments.
| Product | Brand | Material / Finish | Notes |
|---|---|---|---|
| EVIL ENERGY 6AN Male Flare to 1/4″ NPT Pipe Fitting Adapter | EVIL ENERGY Store | 6061-T6 Aluminum, Black Anodized | 2-Pack, 6AN to 1/4″ NPT, 37° flare, 60° NPT taper |
| YSIL 6AN Male Flare to 1/4″ NPT Adapter | YSIL Store | 6061-T6 Aluminum, Anodized | 2-Pack, 37° flare, 60° NPT taper, versatile for fuel systems |
| 6AN Male Flare to 1/4″ NPT Adapter (Aluminum) | Unknown Brand | Aluminum, Black | 2-Pack, commonly used in fuel and cooling lines |
| Ucreative 6AN Male Flare to 1/4″ NPT Adapter | Ucreative Store | 6061-T6 Aluminum | 2-Pack, 9/16-18 UNF, black finish |
| EVIL ENERGY 6AN Male Flare to 1/4″ NPT 90 Degree Swivel | EVIL ENERGY Store | 6061 Aluminum, Black | 90° swivel, 37° flare, 60° NPT taper, 1500 PSI |
EVIL ENERGY 6AN Male Flare to 1/4″ NPT Pipe Fitting Adapter
The EVIL ENERGY adapter is designed as a 6AN to 1/4″ NPT fitting with a black anodized aluminum body. It uses a 37-degree flare on the AN side and 60-degree tapered threads on the NPT side, ensuring a secure seal when used with compatible AN hoses and NPT fittings. This 2-pack provides a cost-effective option for multiple connections in a single build.
YSIL 6AN Male Flare to 1/4″ NPT Adapter
YSIL’s adapter uses a 9/16-18 UNF 6AN flare with a 37-degree taper and a 60-degree NPT thread. Made from 6061-T6 aluminum with an anodized surface, it emphasizes corrosion resistance and durability. The 2-pack format makes it suitable for twin-line installations such as fuel rails or intercooler piping in performance builds.
6AN Male Flare to 1/4″NPT Aluminum Adapter
Promising broad compatibility, this aluminum adapter is commonly used in fuel systems, cooling circuits, and power steering lines. The 9/16-18 UNF 6AN flare matches standard AN hardware, while the NPT side provides a reliable 1/4″ connection. The kit typically includes two adapters, offering flexibility for dual needs in a single installation.
Ucreative 6AN Male Flare to 1/4″ NPT Adapter
Ucreative’s offering comes as a 2-pack, combining a 6AN flare with a 1/4″ NPT side. The 6061-T6 aluminum construction ensures sturdiness under vibration and heat, while the black anodized finish provides additional corrosion resistance. Suitable for fuel lines, cooling loops, and turbo installations where reliable, repeatable seals are essential.
EVIL ENERGY 6AN 90 Degree Swivel Flare to 1/4″ NPT
This swivel fitting adds flexibility in tight engine bays where straight connections are impractical. The 6AN flare matches standard AN hardware, paired with a 1/4″ NPT thread. It features a 37-degree flare seal on the AN side and 60-degree tapered NPT threads on the other, with a working range suitable up to 1500 PSI. Ideal for routing complex hose routes without kinking or stress on the tubing.
Buying Guide
Key purchase considerations for 6AN to 1/4″ NPT fittings include:
- Material and finish: Aluminum with anodized coating is common for corrosion resistance, weight savings, and durability in automotive environments.
- Flare angle and seal: The 37-degree AN flare provides a reliable seal with compatible hoses; the NPT side uses standard tapered threads requiring proper sealing (PTFE tape or thread sealant is often recommended).
- Thread compatibility: Confirm the 6AN side is 9/16-18 UNF and the NPT side is 1/4″ NPT to ensure correct mating with existing components.
- Angle options: Straight versus 90-degree swivel fittings affect hose routing and clearance; consider the engine bay layout and possible heat exposure.
- Pack quantity: Many listings offer 2-pack or multi-pack options, which is useful for twin-line builds or future spares.
- Applications: Common uses include fuel lines, coolant loops, turbocharger feeds, power steering lines, and intercooler piping.
Comparison Highlights
- All listed adapters use 6061-T6 aluminum with anodized finishes for corrosion resistance and strength.
- The 37-degree flare and 60-degree NPT taper provide reliable sealing when properly installed with compatible hardware and sealant where recommended.
- Swivel options (90-degree) offer routing flexibility in tight spaces, while straight adapters maximize flow continuity along a single axis.
- Prices and availability vary by seller; check stock and compatibility with your specific hoses and AN fittings.