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