Aeroflow Stainless Steel Long Inverted Flare Tube Nuts (Pair), M10 x 1.0mm to 3/16″ Hard Line

SKU: AF366L

When plumbing custom brake lines for a track build or classic restoration, certain master cylinders, proportioning valves, and ABS pumps require a deeper reach than a standard fitting can provide. Aeroflow’s Stainless Steel Long Inverted Flare Tube Nuts are specifically engineered with an extended profile to safely and securely engage with these deeply recessed ports.

Differentiating itself from the standard AF366 fitting, this AF366L (Long) version provides the extra shank and thread length necessary to guarantee full thread engagement in deeper female ports, preventing cross-threading, fluid leaks, or catastrophic blow-outs under heavy braking pressure.

Manufactured from premium 304 stainless steel, these tube nuts offer exceptional resistance to rust, corrosion, and the rounding of hex heads during installation. Machined with an M10 x 1.0mm thread profile, they are designed to suit standard 3/16″ (4.76mm) outer diameter brake hard lines and seal perfectly with both ball and inverted flare types.

Supplied as a pair (2x tube nuts per packet).

Key Features & Benefits:

• Extended “Long” Profile: The AF366L features an extended length designed specifically to reach deeper, recessed threads in master cylinders and ABS blocks where the standard AF366 nut will not safely reach.

• Sleek Stainless Finish: Provides a professional aesthetic to complement your engine bay.

• Motorsport Grade: Precision-machined for a safe, high-pressure, zero-leak seal on custom braking systems.

• Premium Material: Constructed from 304 stainless steel to resist rust, corrosion, and hex-head rounding.

• Highly Versatile: Engineered to seat perfectly with both traditional inverted flares and ball flare types.

Technical Specifications:

• Thread Size: M10 x 1.0mm Metric

• Profile Type: Long / Extended Reach

• Hard Line Compatibility: Suits 3/16″ (4.76mm) O.D. Hard Line

• Flare Compatibility: Suits Ball and Inverted Flare types

• Material: 304 Stainless Steel

• Finish: Brushed Stainless

• Quantity: Sold as a Pair (x2 Nuts)

• Part Number: AF366L