Understanding DIN 76-A: The Essential Guide to Thread Undercuts
: The specific rounding radii defined in the DIN 76 PDF technical tables reduce stress peaks at the transition point between the thread and the bolt shank.
: Without an undercut, a nut cannot be screwed all the way to a shoulder because the thread-cutting tool cannot maintain a full profile until the very end.
: The width of the relief is typically about three times the thread pitch (
By correctly implementing , engineers ensure their designs are reliable, easy to assemble, and compliant with international manufacturing norms. Din 76-1 | PDF | Screw | Metalworking - Scribd