AN Fittings

EVIL ENERGY fittings deliver professional-grade fluid transfer solutions for racing, automotive modification, and high-pressure fuel systems. From compact 3AN fittings to popular AN6 fittings and corrosion-proof PTFE AN fittings, every part is engineered for a leak-free, high-flow performance.

What Are AN Fittings & Why Choose EVIL ENERGY?

AN (Army-Navy) fittings use a 37° sealing angle to provide a secure, leak-proof connection—far superior to hose clamps or push-lock systems. EVIL ENERGY's an fitting kits are CNC-machined from 6061-T6 aluminum, anodized for durability, and designed to handle extreme pressure, heat, and vibration.

  • High-precision CNC machining
  • Aerospace-grade 6061-T6 aluminum
  • 37° flare sealing technology for zero leaks
  • Compatible with fuel, oil, coolant, transmission & turbo systems

PTFE Fittings — The Ultimate Choice for E85

If you’re running E85 ethanol, racing fuel, or corrosive fluids, PTFE fittings are essential.

  • PTFE (Teflon) inner core offers unmatched chemical resistance
  • Withstands high temperature and pressure without deformation
  • Designed specifically for PTFE braided hoses
  • Available in straight, 45°, 90° and 180° angles for easy installation

Perfect for: Fuel lines, oil coolers, power steering, brake fluid, turbo oil feed systems.

AN Fitting Sizes Explained (3AN, AN6 & More)

Size Common Use Why It Matters
3AN fittings Brake lines, clutch hydraulic lines, pressure gauge lines Compact design, precision sealing, ideal for tight spaces
AN6 fittings EFI fuel systems, LS swap fuel lines, turbo oil feed Most popular size — perfect balance of flow & flexibility
AN8 / AN10 High-flow fuel delivery, engine oil lines, coolant systems Supports high-horsepower and large displacement engines

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FAQs about AN Fittings

What are AN fittings?

AN fittings are high-performance hose connectors originally designed under the Army-Navy (AN) military standard. They use a 37-degree flare sealing surface to create a secure, leak-free connection in fuel, oil, coolant and hydraulic systems. EVIL ENERGY fittings are widely used in racing, automotive modification and high-pressure fluid transfer.

'AN' stands for Army-Navy. This specification defines the thread size and the 37° flare design used in AN fittings, which ensures precise sealing and compatibility across fuel, oil, and PTFE hose systems.

6AN refers to the size of the fitting and hose. The number '6' means 6/16 inch, or 3/8 inch inner diameter. AN6 fittings are the most common size for fuel lines, especially in EFI, LS engine swaps and turbo oil feed systems.

3AN fittings are smaller and typically used in brake lines, clutch hydraulic systems and pressure gauge connections. They offer compact size and precise sealing in high-pressure applications.

No. AN fittings use a 37° flare to seal, while NPT (National Pipe Thread) relies on tapered threads and often needs thread sealant or PTFE tape. They are not interchangeable because they use different sealing methods, thread angles and pressure ratings.

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