When incorporating DIN 76-A into your CAD models or technical drawings, keep these best practices in mind: 1. Strength vs. Clearance
This is the official source for all DIN standards.
: The most recent draft, DIN 76-1:2024-11 , is available for purchase and download through DIN Media . din 76-a pdf
(Transition Width): The length of the angled chamfer leading back to the blank shaft diameter.
Below is a reference snippet showing standard DIN 76-A values for common metric coarse threads: Nominal Thread ( Undercut Diameter ( Undercut Width ( Transition Radius ( M4 M5 M6 M8 M10 M12 M16 When incorporating DIN 76-A into your CAD models
For physical production, relying on a verified ensures absolute compliance with international machining standards, preventing costly errors during CNC turning and assembly processes.
A standard drawing callout for this specific feature is written as: Thread Undercut DIN 76 – AThread Undercut DIN 76 – A : The most recent draft, DIN 76-1:2024-11 ,
The mating internal thread (like a nut or tapped hole) will hit the incomplete threads near the shoulder, preventing the components from flushing together.
What (e.g., M10, M20) are you working with? Are you designing for high-fatigue load applications? Do you need the measurements in metric or inch conversions ? Share public link
The standard is divided into three primary parts based on the type of thread: : Covers ISO metric threads (coarse and fine pitch). : Covers pipe threads.