The search for is not just about finding a table of numbers. It is about ensuring compliance, safety, and manufacturability. A modern, legally obtained PDF provides:
When a screw or a bolt is manufactured, there needs to be a small groove or relief cut at the end of the thread so the threading tool can exit cleanly without hitting a shoulder. This allows the nut to screw all the way down. DIN 76 defines the dimensions and shapes of these undercuts. din 76-a pdf
If you cut a thread all the way to a shoulder, you risk breaking the tool or creating a weak stress riser. This is where comes in. Technically titled "Thread run-outs and thread undercuts for metric ISO threads," this standard is the blueprint for safe, manufacturable threaded shafts. The search for is not just about finding a table of numbers