scope:

Deals with the properties of heat treated screws with a tapping screw thread in acccordance with ISO 1478, which are designed with a drilling point which drills the core hole for the screw of its own accord during assembly, and which then form the mating screw thread of their own accord, either in a non-cutting or in a cutting operation, with the aid of the threaded portion of the screw adjoining the drilling point. The purpose of this standard is to ensure that the screws are able to drill their core hole and form their mating screw thread without becoming distorted or fracturing in the process, provided that no overstressing has occured.