Automotive Hydraulic Brake System-Metric Tube Connections

This specification establishes requirements for metric fittings used within hydraulic brake systems designed for automotive applications. It defines the dimensional characteristics, thread profiles, and tolerance limits for various connector types to ensure compatibility and integrity across different vehicle manufacturers and component suppliers. The document outlines testing procedures and acceptance criteria to verify that fittings can withstand operating pressures and environmental conditions typically encountered during vehicle operation. By providing a unified set of parameters, this standard facilitates the interchangeability of brake components and supports the safe integration of hydraulic lines in passenger cars and light trucks. Compliance with these guidelines helps maintain system reliability while simplifying the design and manufacturing processes for industry participants. The scope covers both rigid and flexible connections integral to the braking circuit, focusing on metric sizing to align with international engineering conventions.