618-06-05-BLK -6 male to 5/16 tube adapter

Speedflow 618-06-05-BLK | -6 AN Male to 5/16" Tube Adapter – Black

The Speedflow 618-06-05-BLK is a precision-engineered -6 AN male to 5/16" tube adapter designed for high-performance fuel, oil, and cooling line applications. Part of the Speedflow 618 Series, this compression-style fitting converts steel or aluminium hard line tubing to AN fittings with a secure, leak-free seal.

How It Works

This adapter uses a compression olive (ferrule) system to grip and seal the tubing without the need for flaring. Simply insert the tube, tighten the fitting, and the olive compresses to form a reliable, vibration-resistant seal — ideal for motorsport and performance street applications where reliability is non-negotiable.

Key Features

• -6 AN male thread for direct connection to standard AN fittings and hose ends
• 5/16" tube bore — compatible with 5/16" OD steel or aluminium hard line
• Compression olive seal — no flaring required, fast and secure installation
• Black anodised aluminium construction for corrosion resistance and a clean, stealth finish
• Confirm suitability for the intended fluid and operating conditions before using this adapter
• Part of the Speedflow 618 Series — engineered for motorsport-grade performance

Specifications

• Part Number: SF618-06-05-BLK
• AN Size: -6 AN Male
• Tube Size: 5/16" (7.94mm) OD
• Material: Anodised Aluminium
• Finish: Black Anodised
• Seal Type: Compression Olive
• Compatible Tubing: Steel or Aluminium hard line

Applications

Perfect for race cars, track day builds, hot rods, and performance street vehicles requiring a clean hard-line to AN conversion. Confirm application suitability for the exact tube, fitting and complete assembly rather than selecting by engine family alone.

In stock in Perth, WA — ships Australia-wide.

Brake-system suitability

Brake-system suitability has not been verified for this compression adapter. Do not select it for a brake installation without explicit manufacturer confirmation for the exact fitting, tubing and complete assembly. Confirm permitted tube material, wall thickness, preparation, working pressure and temperature, and follow the manufacturer's assembly instructions.