GB/T 3478.2-2008

This standard provides the specific dimension tables for straight cylindrical involute splines with a 30° pressure angle and metric module, enabling precise manufacturing and quality control of side-fit spline connections. It is applied in mechanical engineering contexts such as automotive transmissions, machine tools, and aerospace components where standardized spline dimensions ensure interchangeability and reliable torque transmission between shafts and hubs. The tables serve as a reference for engineers and procurement professionals to select or verify spline sizes during design, production, or inspection.