Pdf [verified]: Din 76a

While you should always consult an official, licensed DIN 76-A PDF download from authorized distributors (like Beuth Verlag) to verify tolerances for production, the table below outlines standard dimensions for common metric coarse pitches according to DIN 76-1 Form A: Thread Pitch ( Undercut Diameter ( Undercut Width ( Transition Radius ( (e.g., M3) 0.7 mm (e.g., M4) 0.8 mm (e.g., M5) 1.0 mm (e.g., M6) 1.25 mm (e.g., M8) 1.5 mm (e.g., M10) 1.75 mm (e.g., M12) 2.0 mm (e.g., M16) (Note: represents the nominal major diameter of the thread). Comparison: Form A vs. Form B

On engineering drawings, you do not need to manually sketch every radius and angle of the undercut. Instead, use the standardized DIN notation to keep drawings clean and universally understood. din 76a pdf