Typically from 9.5 mm to 80 mm or higher, depending on the manufacturer.
When designing structural components or sourcing manufacturing parts, relying on secondary data tables can lead to compliance issues. To ensure exact tolerances, engineers should source an official, updated version of the standard.
DIN 7504 is a German standard (Deutsches Institut für Normung) for self-drilling tapping screws.
The "K" profile is optimized to reduce hoop stress. If a standard sharp thread profile were used, the stress concentration factor ($K_t$) could exceed the fracture toughness of the plastic, leading to boss bursting. The DIN 7504 K profile distributes the radial force over a larger surface area, allowing the use of higher tightening torques without structural failure of the parent component.
Attaching components to metallic elements. 5. DIN 7504 K vs. ISO 15480 din 7504 k standard pdf
Understanding the DIN 7504 K Standard: Specifications, Dimensions, and Applications
The critical dimensional parameters according to standard engineering criteria include: Thread Size (d) Head Height ( kmaxk sub m a x end-sub Width Across Flats (s) Flange/Collar Diameter ( dc maxd sub c space m a x end-sub Sheet Drilling Capacity 0.70 – 2.25 mm ST 3.9 0.70 – 2.40 mm ST 4.2 1.75 – 3.00 mm ST 4.8 1.75 – 4.40 mm ST 5.5 1.75 – 5.25 mm ST 6.3 2.00 – 6.00 mm
The standard specifies requirements for hexagon head self-drilling tapping screws equipped with a flange or embossed washer . While the original DIN standard has been officially withdrawn, it remains widely used in the industry and corresponds directly to the international standard ISO 15480 . Technical Specifications Summary
⚠️ Free PDFs from file-sharing sites are often outdated (e.g., pre-2010 drafts) or incomplete. Using incorrect specifications can lead to joint failure, stripped threads, or improper clamping loads. Typically from 9
Attaching metal components on assembly lines. How to Find the DIN 7504 K Standard PDF
Larger thread diameters require slower installation speeds. For instance, ST 4.2 screws handle speeds up to 2,500 RPM, whereas ST 6.3 screws should generally not exceed 1,500 RPM.
The standard specifies the materials for hexagon head bolts:
This comprehensive guide breaks down the essential geometry, material requirements, mechanical properties, and field applications detailed across technical data sheets and official documents like the Aspen Fasteners DIN 7504 Spec and TME’s Fastener Database . What is Form K? Understanding the DIN 7504 Variations DIN 7504 is a German standard (Deutsches Institut
The standard applies to hexagon head bolts with metric fine pitch thread, made from steel, stainless steel, or other materials, with a nominal diameter range of M3 to M36. These bolts are typically used in various industrial applications, such as construction, machinery, and equipment.
To ensure mechanical integrity, manufacturers strictly adhere to the dimensional matrices laid out in the official DIN 7504 K PDF documentation. The fasteners are typically categorized by their thread size (d) and length (l). 1. Dimensional Parameters
Mounting brackets, interior panels, and thin metal shields.