Din 7504 K Standard Pdf _hot_ Jun 2026

The standard specifies the surface finish requirements:

Assembling ductwork and securing ventilation housing units.

This design not only saves time but also lowers tooling costs and simplifies inventory, as a single type of screw can be used for various tasks. din 7504 k standard pdf

Adopting self-drilling screws following the DIN 7504 K or ISO 15480 standard offers significant benefits over traditional fastening methods:

While I cannot provide the copyrighted official DIN document, you can find the technical specifications in several reputable databases by searching for: "DIN 7504 K Bossard" "ISO 15480 standard pdf" (The international equivalent) Self-drilling screws under this standard feature a unique

Fastening corrugated steel sheets to steel or timber purlins.

Self-drilling screws under this standard feature a unique drill point. This point allows the screw to drill its own hole, tap a thread, and fasten materials in a single operation. The "K" variant specifically designates the hexagonal head integrated with a flat washer face, providing a large load-bearing surface. If you locate a genuine , it will

If you locate a genuine , it will typically include the following critical sections:

The DIN 7504 standard specified that screws must be made of (hardened) to ensure the drill point can penetrate sheet metal without blunting. Besides standard carbon steel, high-quality versions are available in stainless steel grades A2 (304) and A4 (316) .

Attaching metal components where pre-drilling is difficult.

| Nominal Size (d) | Thread Pitch (P) | Head Height (k) | Width Across Flats (s) | Drill Bit Diameter (dp) | Max. Sheet Thickness | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | ST 3.5 | 1.3 mm | 3.0 - 3.4 mm | 5.5 mm | 2.8 mm | up to 2.25 mm | | ST 3.9 | 1.3 mm | 3.0 - 3.4 mm | 5.5 mm | 3.1 mm | up to 1.75 - 3.0 mm | | ST 4.2 | 1.4 mm | 3.6 - 4.1 mm | 7.0 mm | 3.6 mm | up to 3.0 mm | | ST 4.8 | 1.6 mm | 3.8 - 4.3 mm | 8.0 mm | 4.1 mm | up to 4.4 mm | | ST 5.5 | 1.8 mm | 4.8 - 5.4 mm | 8.0 mm | 4.8 mm | up to 4.8 mm | | ST 6.3 | 1.8 mm | 5.3 - 5.9 mm | 10.0 mm | 5.8 mm | up to 6.0 mm |