Specification for normal and high strength steel bolts and nuts for railway rail fishplates|Fish plates, Square-head fasteners, Dimensional tolerances, Threaded fasteners, Bolts, Thickness, Pan-head fasteners, Dimensions, Quality control, Width, Railway equipment, Elongation, Marking, Proof loading, Tensile strength, Hardness, BSF screw threads, Diameter, Railway fixed equipment, Cup-head fasteners, Tensile loading, Whitworth screw threads, Length, Size, Fasteners, Nuts, Railway track, Grades (quality), Steels Railway applications