Threaded fasteners; Axial load fatigue testing; Part I : Test methods

This standard establishes the fundamental procedures for conducting fatigue tests on threaded fasteners under axial loading conditions. Specifically, it outlines the methodology required to evaluate the endurance limits of these components when subjected to cyclic forces along their longitudinal axis. The document details the necessary specimen preparation, including dimensional tolerances and surface finish requirements, to ensure consistent test results across different laboratories. It describes the testing machinery configurations and the specific loading patterns that must be applied to simulate real-world operational stresses. Furthermore, the text provides guidelines for recording load cycles and analyzing the resulting failure modes. The approach ensures that data obtained from these experiments can be reliably compared to assess the durability and quality of threaded fasteners in various engineering applications. By following these outlined steps, manufacturers and testing facilities can generate reproducible data that reflects the true fatigue performance of the components without relying on subjective interpretations.