DIN 610 specifies the characteristics of hexagon fit bolts with short threaded portion and pilot recess, a specific type of fastener used in various mechanical and engineering applications. This German standard, part of the comprehensive Deutsches Institut für Normung (DIN) system, outlines critical dimensions, materials, strength grades, and tolerance requirements for these bolts to ensure compatibility and reliability across applications. The short threaded portion of DIN 610 bolts is designed to provide a precise fit in tapped holes or nuts, while the pilot recess aids in the alignment during assembly, enhancing the efficiency of installation processes and the structural integrity of the assembled components. By adhering to the specifications set forth in DIN 610, manufacturers and engineers can ensure a high level of consistency and performance in their products and projects, facilitating both domestic and international collaboration and interchangeability of parts.