Choosing the right female-to-female AN fittings ensures reliable connections in automotive, racing, and fuel-system projects. The following picks focus on 6AN and related sizes, offering strong aluminum bodies, 37-degree flare seals, and high working pressures. This guide highlights compatibility, materials, and sealing features to help you compare options for corrosion resistance, temperature tolerance, and ease of use.
Summary of Selected Products
| Product | Brand | Thread | Materials | Key Benefit |
|---|---|---|---|---|
| EVIL ENERGY 6AN Female to 6AN Female Straight Swivel Coupler | EVIL ENERGY | 9/16-18 UNF | Aluminum | Swivel design reduces line kinks |
| EVIL ENERGY 6AN Female to 6AN Female Straight Swivel Coupler Union | EVIL ENERGY | 9/16-18 UNF | Aluminum | Additional swivel union for flexibility |
| CNRAQR 6AN Female to 6AN Female Swivel Coupler | CNRAQR | 9/16-18 UNF | Aluminum 6061-T6 | Corrosion-resistant, high strength |
| Ucreative 6AN Female to 6AN Female Straight Swivel Coupler | Ucreative | 9/16-18 UNF | Aluminum | Includes 2 pieces per pack |
| 1/2 Inch NPT Female x 3/8 Inch NPT Female Reducer (Stainless Steel) | PipeFloPro | 1/2″ NPT to 3/8″ NPT | 304 Stainless Steel | Versatile NPT reducer for non-AN systems |
EVIL ENERGY 6AN Female To 6AN Female Straight Swivel Coupler
The fitting is 6AN to 6AN with a 9/16-18 UNF thread. It supports a maximum working pressure of 1,500 PSI and operates from -40°F to 250°F. The flare seal uses a 37-degree seating angle on the AN side, delivering a reliable seal for high-pressure lines. Aluminum construction keeps weight down while maintaining strength for performance applications.
EVIL ENERGY 6AN Female To 6AN Female Straight Swivel Coupler Union
This 6AN female-to-female swivel coupler offers a swivel feature to reduce hose tension and bending. It uses a 9/16-18 UNF thread and shares a 1,500 PSI maximum working pressure with a -40°F to 250°F operating range. The 37-degree flare seal on the AN side ensures a solid, leak-resistant connection in demanding setups.
CNRAQR 6AN Female To 6AN Female Swivel Coupler
CNRAQR’s 6AN female-to-female swivel coupler uses aluminum 6061-T6 for strength and corrosion resistance. It is rated up to 1,500 PSI and supports temperatures from -40°F to 250°F. The fittings use a 9/16-18 UNF thread and feature a 37-degree flare seal for reliable performance in fuel and cooling line applications.
Ucreative 6AN Female To 6AN Female Straight Swivel Coupler
Ucreative’s 6AN female-to-female straight swivel coupler includes two pieces per pack, providing value for multiple lines. With a 9/16-18 UNF thread and a maximum working pressure of 1,500 PSI, it covers a wide range of high-performance fluid systems. The -65°F to 252°F temperature range supports use in cold to hot environments, while the 37-degree flare seal helps prevent leaks.
1/2 Inch NPT Female x 3/8 Inch NPT Female Reducer (Stainless Steel)
This stainless steel reducer uses 1/2″ NPT female threads to 3/8″ NPT female threads. It adheres to NPT 60° tapered threading and supports a working pressure up to 2,000 PSI with a wide operating range (-60°C to +400°C). It is suitable for water, oil, steam, and gas lines where AN fittings are not used.
EVIL ENERGY 6AN Extender Female To AN6 Male Extension
Extender fittings extend reach between components. This EVIL ENERGY model uses AN6 threads (9/16-18 UNF) and offers a maximum working pressure of 1,500 PSI with a -40°F to 250°F range. The AN-side flare seal uses a 37-degree angle, ensuring a sealed connection in compact or hard-to-reach layouts.
EVIL ENERGY 6AN Female To 3/8″ Barb Swivel
This 6AN female-to-barb swivel adapter expands compatibility to 3/8 inch barb hose. It uses aluminum 6061-T6, supports up to 1,500 PSI, and operates from -40°F to 250°F. The 37-degree SEAL on the AN side provides a secure, leak-resistant connection in performance systems, with a swivel feature to reduce hose strain during installation.
Buying Guide: Key Purchase Considerations
- Thread compatibility: Confirm 9/16-18 UNF for 6AN fittings. Mismatched threads cause leaks or failure at high pressure.
- Sealing and seating angle: Most AN fittings rely on a 37-degree flare for reliable seals; ensure the mating hose ends are compatible.
- Material and corrosion resistance: Aluminum 6061-T6 is common for lightweight strength; stainless steel options suit more corrosive environments.
- Pressure and temperature ratings: Look for PSI ratings around 1,500 PSI and temperature ranges from cold to hot to fit your system.
- Swivel features: Swivel couplers reduce line kinking and make installations easier, especially in tight spaces.
- Pack quantity: Some listings include multiple adapters; consider whether you need single or multi-pack options to complete a project.
- Non-AN alternatives: In some systems, NPT or barb fittings may be used; verify compatibility with your fluid and components.
- Brand and warranty: Reputable brands offer better tolerances and customer support; check return policies if unsure.