The DIN 7504 K standard (often equated with the international ISO 15480 standard
The integrated flange provides a larger bearing surface to distribute the load. Thread Size Width Across Flats (s) Head Height (k max) Washer Diameter (dk max) ST 3.5 ST 4.2 ST 4.8 ST 5.5 ST 6.3 Data compiled from various technical datasheets. 2. Drilling Capacity din 7504 k standard pdf
The "K" point is designed to pierce and form threads in pre-punched or pre-drilled holes without creating chips. Unlike thread-cutting screws (which remove material), thread-forming screws (like the DIN 7504 K) displace the material of the workpiece, creating a tight, residual compressive stress around the threads. The DIN 7504 K standard (often equated with
Here's some general information on the standard: Drilling Capacity The "K" point is designed to
No specific mathematical formulas or equations are included in this write-up; hence no special $$ syntax is used here.
Always verify the specified in the standard. Too small = breakage; too large = thread stripping. The 2016 edition provides updated formulas for hole sizes based on material thickness and strength.