IFI-113, Steel Self-Drilling Tapping Screws


Issued 1971; Revised 2015



This inch series standard covers requirements for 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.