The DIN 7504 K standard (often equated with the international ISO 15480 standard
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 While the original DIN standard has been officially withdrawn, it remains widely used in the industry and corresponds directly to the international standard ISO 15480 .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 din 7504 k standard pdf
(Note: The above is a summary. The official PDF contains full tolerance classes.) The DIN 7504 K standard (often equated with
Common sizes include ST 3.5, ST 4.2, ST 4.8, ST 5.5, and ST 6.3. The official PDF contains full tolerance classes
The PDF contains precise tables detailing:
| Feature | Benefit | |---------|---------| | No pre-tapping | Saves 30-50% assembly time | | No cutting chips | Eliminates cleaning operations | | High strip-to-drive ratio | Reliable torque control | | Reusable (limited times) | Standard allows for 2-3 reuses |