Hexagonal head set screw with conical pin

Hexagonal head and conical pin DIN 564 B pressure screws are characterized by a small hexagonal head and a pin at the end of their thread. Form B does not have a recess under the head, and the thread is all the way to the end, unlike form A, where there is still a small recess between the thread and the head. At the end of the thread there is a pin, the task of which is to precisely and firmly press the material to the substrate.

In the case of pressure screws, instead of the standard mechanical property class, its hardness is given, e.g. 22H. This is due to the fact that due to their use - pressure - their hardness is given instead of tensile and shear strength.

Hexagonal head and conical pin DIN 564 form A (~PN 82304) pressure screw – reliable and precise pressure for your application

Hexagonal head and conical pin pressure screws DIN 564 A are characterized by a small head diameter and a pin at the end of their thread. Form A also differs from form B in that it has a small undercut on the screw shank, located between the thread and the head. The pin is cylindrical in the first phase, but later begins to converge to a cone to obtain a precise pressure point.

Why is hardness specified for DIN 564 screws instead of a mechanical property class?
This is because pressure screws have a different function than standard screws, which transfer shear-tensile loads.
The property class (e.g. 8.8, 10.9, 12.9) defines the tensile strength of the material (first number) and the yield strength (second number). This is a key property for screws carrying tensile loads, where it is important at what stress the screw will undergo permanent deformation or break. Hardness (e.g. 14H, 22H) defines the resistance of the material to indentation (e.g. Rockwell method). This is important for pressure screws, where a cylindrical journal is pressed into the material being joined. Hardness refers to the surface of the material, in this case the cylindrical journal.