NPT to AN Adapter Fittings — Reliable Fuel & Oil Connections

Convert traditional NPT (National Pipe Thread) ports on fuel pumps, sending units, fuel rails, and regulators to precise AN (Army-Navy) flare connections. These adapters deliver a secure, leak-resistant interface that stands up to high pressure and vibration in performance builds and racing environments.

Crafted from durable, corrosion-resistant anodized aluminum in a sleek black finish and available in straight, 45°, and 90° angles to fit tight engine bays and custom layouts.

Key Benefits

• Fast conversion: Bridge NPT ports to AN flare systems across fuel and oil plumbing.
• Leak-resistant: AN 37° flare seals metal-to-metal; NPT side threads with sealant.
• Built to last: CNC-machined anodized aluminum resists corrosion and harsh conditions.
• Angles for any layout: Straight, 45°, and 90° options simplify routing.

Technical Specs

Why Convert NPT to AN?

NPT seals via tapered threads and sealant—effective, but prone to loosening under vibration. AN uses a repeatable 37° flare for a robust metal-to-metal seal. With these adapters, you keep existing NPT ports while stepping up to leak-tight AN plumbing for modern EFI performance.

Recommended Pairings

• AN PTFE Hose & Fittings Bundles — build clean, reliable lines to match your adapters.
• AN Adapter Fittings (Full Collection) — reducers, expanders, ORB, caps & plugs, and more.
• Gauge/Pressure Port AN Adapter — add a sensor or gauge easily.
• Hardline Tube to AN Fittings — transition factory hardline to AN flare.
• AN Hose Installation Tools — faster, cleaner assembly with fewer do-overs.

Install Tip

FAQ