Male Inverted Flare to AN Adapter fitting (SAE & Metric)
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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.
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SAE (UNF): 1/2-20, 5/8-18
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Metric: M10×1.0, M12×1.5, M14×1.5, M16×1.5, M18×1.5
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AN side: AN-6 or AN-8
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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
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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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