DIN 76 is the German industrial standard governing thread run-outs (also known as thread run-outs or undercuts) for ISO metric threads. is specifically designed for external threads, ensuring that the thread terminates properly and a mating part can seat firmly.
Properly rounded undercuts reduce the "notch effect," which prevents stress fractures at the weakest point of a fastener. Flush Assembly: din 76-a pdf
Thread run‑outs and thread undercuts might seem like minor details, but in precision manufacturing they can make the difference between a reliable assembly and a field failure. DIN 76‑A is one of the most widely referenced German fastener standards for ensuring that threaded components seat correctly, tools run safely, and threads meet their specified strength requirements. If you have been searching for a – whether to download the official document, understand its dimensions, or apply the standard in your own designs – this article provides a comprehensive, actionable guide. DIN 76 is the German industrial standard governing