The document contains dimensional and technical requirements of hexagon head set screws with small hexagon and dog point and specifies their designation.
DIN 561:1995 history
1995DIN 561:1995-02 Hexagon head set screws with small hexagon and full dog point
1995DIN 561:1995 Hexagon head set screws with small hexagon and dog point
1970DIN 561:1967 Hexagon head set screws with small hexagon and full dog point