DIN 436 is a technical standard that specifies the dimensions and tolerances for retaining rings (also known as circlips) used in mechanical engineering. These retaining rings are essential components for securing different parts in place within a machine or assembly. The standard outlines the precise measurements for the various types of retaining rings, ensuring that they fit securely and function effectively in their designated applications. By establishing these specific dimensions and tolerances, DIN 436 enables manufacturers to produce retaining rings that meet the necessary quality and performance standards, ultimately contributing to the reliable and safe operation of the machinery in which they are used.