Descriptors | Fasteners, Steels, Mechanical properties of materials, Unalloyed steels, Alloy steels, Threaded fasteners, Internal-thread fasteners, Nuts, Hexagonal-head fasteners, Diameter, Thread pitch, Designations, Proof stress, Proof loading, Grades (quality), Chemical composition, Hardness, Marking, Hardness testing, Mechanical testing, Failure (mechanical), Testing conditions |