Because DIN standards are copyrighted, "free" PDFs found on the web are often unauthorized or outdated. To ensure your engineering team is working with the most current data, you should:
Standard undercut for external threads (normal depth). din 76-a pdf
Tools like SolidWorks, McMaster-Carr, and TraceParts often have DIN 76-A geometries pre-configured in their fastener libraries. Because DIN standards are copyrighted, "free" PDFs found
(Undercut Diameter): The diameter of the recessed portion. It is always smaller than the minor diameter of the thread. (Undercut Width): The longitudinal width of the recess. Because DIN standards are copyrighted