Sae J512 Pdf __full__ Download May 2026

Often referred to as "double flares" in brake systems, these feature a 42° or 45° internal seat that provides a robust metal-to-metal seal.

Source: AllHose SAE Fittings Guide and Alfagomma Guidelines . J512_202203 : Automotive Tube Fittings - SAE International

These utilize a 45° seat for sealing and are commonly used in low-pressure applications like fuel and oil lines. sae j512 pdf download

For quick reference, standard dimensions for SAE 45° flare fittings include: Tube O.D. (in) Thread Size (UNF) Male Thread O.D. (mm) 5/16 – 24 3/8 – 24 7/16 – 20 1/2 – 20 5/8 – 18

The standard covers several types of fittings designed for high-performance sealing in automotive and appliance applications: Often referred to as "double flares" in brake

The standard, published by SAE International , defines the general and dimensional specifications for automotive tube fittings used in passenger cars, trucks, and fluid power systems. To download the official, most current version (reaffirmed in March 2022), you can visit the SAE J512 Standard Page. Key Specifications of SAE J512

Fittings are typically manufactured from brass (e.g., UNS C36000) or steel, depending on the application's pressure and corrosion requirements. For quick reference, standard dimensions for SAE 45°

Most use Unified Fine (UNF) threads to ensure a strong mechanical connection while the flared surface handles the sealing. Technical Data & Size Chart