scope:

Scope and field of application

This standard specifies dimensions, requirements and test methods for heat-treated cross recessed head thread cutting screws with an IS0 metric thread as specified in DIN 13-12, with cutting flutes extending from the point of the screw to its head, and designed to cut their mating thread during assembly. See the relevant DIN Standards for head styles, IS0 8992 for general requirements, and IS0 3269 for acceptance inspection.

The specifications of this standard are intended to ensure that thread cutting screws are capable of performing the above functions without fracturing or their own thread being deformed. To that end, requirements have been specified for thread cutting capability, surface hardness, tensile strength and torsional strength.