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Male Inverted Flare to AN Adapter fitting (SAE & Metric)
  • Male Inverted Flare to AN Adapter fitting (SAE & Metric)
Male Inverted Flare to AN Adapter fitting (SAE & Metric)

Male Inverted Flare to AN Adapter fitting (SAE & Metric)

$10.99 USD
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Male Inverted Flare → Male AN Adapter Fittings (SAE & Metric)

Cleanly adapt factory hardlines to modern AN plumbing—no leaks, no guesswork. These adapters mate a male 45° inverted flare on the vehicle side to a male 37° AN on the hose side. Offered in popular SAE and metric threads with AN-6 and AN-8 options, anodized black aluminum to match your build.

Why builders choose this adapter

  • Converts OE inverted-flare hardlines to serviceable AN plumbing in minutes.
  • Both SAE and metric thread sizes for broad compatibility.
  • Pairs perfectly with our PTFE hose ends and hose & fittings bundles.
  • Flare-to-flare sealing—no thread sealant on the seats.

Great for

  • EFI conversions on classics (factory hardline → AN-6 feed/return).
  • Refreshing carb systems with modern AN plumbing.
  • Transmission cooler hardline to AN hose transitions.
  • Upgrading tired rubber sections to durable PTFE-lined assemblies.

Sizing & compatibility

Vehicle side: male inverted flare (45°) thread that seats on a female inverted-flare fitting. Hose side: male AN (37°) that seats on a female AN hose end. Choose your thread and AN size above.

  • SAE (UNF): 1/2-20, 5/8-18
  • Metric: M10×1.0, M12×1.5, M14×1.5, M16×1.5, M18×1.5
  • AN side: AN-6 or AN-8
  • Not compatible with ISO “bubble flare” seats or banjo ports—verify your seat type.

Need a refresher on thread types and sealing? Read: AN vs. ORB vs. NPT vs. NPSM — No-Leak Guide.

Specs

Thread (Vehicle Side) Seat Available AN Side Material / Finish Sealant Needed
SAE 1/2-20 45° inverted flare (male) AN-6, AN-8 6061 aluminum, black anodized No (flare seats seal)
SAE 5/8-18 45° inverted flare (male) AN-6, AN-8 6061 aluminum, black anodized No (flare seats seal)
M10×1.0 45° inverted flare (male) AN-6, AN-8 6061 aluminum, black anodized No (flare seats seal)
M12×1.5 45° inverted flare (male) AN-6, AN-8 6061 aluminum, black anodized No (flare seats seal)
M14×1.5 45° inverted flare (male) AN-6, AN-8 6061 aluminum, black anodized No (flare seats seal)
M16×1.5 45° inverted flare (male) AN-6, AN-8 6061 aluminum, black anodized No (flare seats seal)
M18×1.5 45° inverted flare (male) AN-6, AN-8 6061 aluminum, black anodized No (flare seats seal)

Tip: For UNF, measure outside diameter (≈ nominal size in inches) and confirm threads-per-inch (TPI). For metric, OD ≈ nominal diameter (mm) and pitch is distance between threads (e.g., 1.5 mm).

What’s included

  • (1) Male inverted flare → male AN adapter, selected thread and AN size.

Install notes

  • No tape or paste on flare seats. Seat lightly, then tighten ~1/8–1/4 turn. Do not overtighten.
  • Use AN wrenches; route hoses with rubber-cushioned clamps every 12–18".
  • Building PTFE hoses? See our installation instructions and grab the tool bundle. When cutting PTFE hose, wrap the cut area tightly with tape to control fray.

Safety note: Not intended for hydraulic brake systems. Use dedicated, certified brake components for brakes.

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