Ключевые слова:
Self-tapping screws, Screws (bolts), External-thread fasteners, Threaded fasteners, Fasteners, Drilling, Heat-treatable steels, Case-hardening steels, Steels, Heat treatment, Mechanical properties of materials, Surface properties, Hardness, Torsional strength, Strength of materials, Torsion testing, Mechanical testing, Crystal microstructure, Embrittlement, Hardness measurement, Inspection, Performance testing, Test equipment, Testing conditions, Test specimens