Examples and table with designation. Material: steel for classes 4d, 5s and 8g, according to UNI 3740-65, or other material that must be indicated in the designation instead of the class.
UNI 6418-1969 history
1969UNI 6418-1969 Hexagon nuts for nomenclature of railway and tramway rolling stock. ISO metric coarse thread. Finish a.