1. DIN 961, also known as Deutsches Institut für Normung 961, is a standard issued by the German Institute for Standardization that pertains to the specifications for fine pitch threads with partial profile according to ISO 965-2. This standard regulates the dimensions, tolerances, and technical requirements for metric fine pitch threaded fasteners such as screws and bolts. Adhering to DIN 961 ensures interchangeability and compatibility between different manufacturers, as well as the reliable performance of threaded connections in various industrial applications. Compliance with this standard is crucial for maintaining quality and consistency in the production and use of fine pitch threaded fasteners.