DIN 604, a standard published by the German Institute for Standardization, outlines the specifications and requirements for metric ISO threads. This standard defines the dimensions, tolerances, and design principles for internal and external threads, ensuring consistency and interchangeability across various industries and applications. By providing a unified framework for thread design, DIN 604 enables manufacturers to produce high-quality threaded components that can be reliably used in a wide range of products, from machinery and equipment to automotive and aerospace applications.