Link: Din 7504 K Standard Pdf
DIN 7504 K
The standard specifies the requirements for self-drilling screws with a hexagonal head and a tapping screw thread . This standard is crucial for ensuring that these fasteners can drill their own pilot holes in a single operation, typically in metal applications.
Scope and Key Content
- Manufacturers and suppliers of screw and bolt fasteners should ensure that their products comply with the DIN 7504 K standard.
- Engineers and designers should reference the DIN 7504 K standard when specifying screw and bolt fasteners for various applications.
- Quality control professionals should ensure that products meet the requirements outlined in the DIN 7504 K standard.
- Nominal diameter: The diameter of the bolt, measured at the thread crest.
- Thread pitch: The distance between two adjacent threads on the same thread.
- Fine pitch thread: A thread with a pitch that is smaller than the coarse thread.
DIN 7504 K standard PDF
If you locate a genuine , it will typically include the following critical sections: din 7504 k standard pdf
Marking and Packaging
- Thread Profile: The profile is typically trapezoidal or rounded, designed to minimize radial stress concentrations that can crack plastic bosses.
- Pitch (P): The standard specifies a coarse pitch relative to the nominal diameter. This increased pitch creates a larger helix angle, allowing for faster installation and greater axial load distribution.
- Lead-in Point: The screw features a specialized forming point (usually type C or similar) to facilitate the concentric start of the threading process without pre-drilling or with minimal pilot hole preparation.