The standard specifies tabular layout of product properties for standardized and non-standardized fasteners with internal thread and allocates identifications to the characteristics which are specified in the DIN parts library.
DIN 4000-161:2007 history
2007DIN 4000-161:2007-02 Tabular layout of product properties - Part 161: Fasteners with internal thread
2007DIN 4000-161:2007 Tabular layout of product properties - Part 161: Fasteners with internal thread
0000 DIN 4000-161:2005
1999DIN 4000-2:1999 Tabular layouts of article - Part 2: Characteristics for screws and nuts