IFI-504, Metric Self-Drilling Tapping Screws

This standard covers requirements for metric steel, self-drilling, tapping screws suitable for use in general engineering applications. The objective of this standard is to ensure that self-drilling tapping screws, by meeting the mechanical and performance requirements specified, shall drill a hole and form or cut mating threads in materials into which they are driven, without deforming their own thread and without breaking during assembly. NOTE: The performance requirements covered in this standard apply only to the combination of laboratory conditions described in the testing procedures. If other conditions are met in an actual service application (such as different materials, thicknesses, etc.) drilling speed, drill load, starting torque, failure torque, and driving time values may require adjustment.