Based on the previous context of mechanical engineering part terminology translation, the full professional English translation is as follows:

This product relies on the elastic deformation of the nut itself to make the thread surface closely fit the male thread, achieving strong axial fastening. It is suitable for scenarios with harsh working environments, limited installation space, and where nuts are prone to loosening.
Hardness: ‌HRC 28-32‌
Thread Tolerance: ‌ISO 4H‌
Face Runout: ‌0.005