| Feature | Dimension | Value (mm) | | :--- | :--- | :--- | | Thread Pitch | P | 1.5 | | Run-out length (x) | Short | 3.0 | | Run-out length (x) | Long | 4.5 | | Undercut width (b) | ~ | 3.2 – 3.7 | | Undercut bottom dia (d₁) | ~ | 8.0 |
Often hosts unofficial previews or older versions for reference. Din 76-1 | PDF | Screw | Metalworking - Scribd
Note: The transition angle from the undercut diameter back to the thread major diameter or shoulder is typically 30°. How to Call Out DIN 76-A on Technical Drawings din 76-a pdf
Designed for use with ISO metric coarse and fine threads as per DIN 13-1. Where to find the full standard:
This is the most critical section for readers searching for . We strongly advise against downloading random PDFs from file-sharing websites, which may be: | Feature | Dimension | Value (mm) |
If you have a drawing or a requirement citing "DIN 76-a," it is asking for the of the undercut calculated according to the DIN 76 standard.
In mechanical engineering and manufacturing, precision is everything. When designing threaded fasteners or tapped holes, components must fit together perfectly without interference. One critical standard that ensures this smooth assembly is . Where to find the full standard: This is
To access the official (which covers Type A thread undercuts), you can purchase or download it via authorized distributors like DIN Media or Beuth. Previews and archived versions of the standard, specifically covering thread run-outs and undercuts for ISO metric threads, are also hosted on document-sharing platforms like Scribd .