Din 76-a Pdf Repack (2026)

| Thread size (M) | Pitch P (mm) | Undercut width a (mm) | Undercut depth t (mm) | |----------------|--------------|------------------------|------------------------| | M3 | 0.5 | 0.8 | 0.15 | | M4 | 0.7 | 1.0 | 0.20 | | M5 | 0.8 | 1.2 | 0.25 | | M6 | 1.0 | 1.5 | 0.30 | | M8 | 1.25 | 1.8 | 0.35 | | M10 | 1.5 | 2.0 | 0.40 | | M12 | 1.75 | 2.5 | 0.50 | | M16 | 2.0 | 3.0 | 0.60 |

: Some find the DIN 76 series a bit "dry" (as it's mostly tables of millimetre measurements), but its technical accuracy for ISO metric threads (DIN 13-1) is unmatched. Where to Find the Specs din 76-a pdf

If you’re working with ISO metric threads, getting the right is critical for ensuring proper fit and preventing stress concentration at the transition point of a bolt or screw. | Thread size (M) | Pitch P (mm)