340-03 -3 male to 3/8" - 24 male inv

Speedflow SF340-03 | -3 AN Male to 3/8"-24 Male Inverted Flare Adapter

The Speedflow SF340-03 is a precision-machined -3 AN male to 3/8"-24 male inverted flare adapter, designed to connect -3 AN braided line systems to components with a 3/8"-24 inverted flare (double flare) port. This adapter is an essential fitting for builders integrating AN-style braided brake lines with OEM or factory-style inverted flare brake components, master cylinders, and proportioning valves commonly found on American and Australian performance vehicles.

Product Specifications

• Part Number: SF340-03
• AN End: -3 AN male
• Inverted Flare End: 3/8"-24 male inverted flare
• Weight: 12g
• Series: Speedflow 340 — AN to Inverted Flare Adapters
• Barcode: 9342122002601

Applications

The SF340-03 is a key adapter for brake system upgrades and custom line fabrication, including:

• Connecting -3 AN braided brake lines to OEM master cylinders with 3/8"-24 inverted flare ports
• Brake proportioning and bias valve connections on factory-style brake systems
• Hot rod, muscle car, and classic vehicle brake line upgrades from steel tube to AN braided
• Holden, Ford, and GM vehicle brake system AN conversion builds
• Any application bridging AN braided lines to inverted flare brake components

AN to Inverted Flare — Bridging Two Standards

The 3/8"-24 inverted flare (also known as a double flare) is the dominant standard for OEM steel brake tubing connections across American and Australian vehicles, while -3 AN is the preferred standard for aftermarket braided brake line systems. The SF340-03 bridges these two standards in a single compact adapter, eliminating the need for custom tube fabrication and allowing a clean, professional transition between factory and aftermarket brake components.

Sold individually. Weight: 12g. Compatible with standard -3 AN hose ends and 3/8"-24 inverted flare ports.