This European Standard gives specifications for hexagon flange bolts, small series, with threads from M5 up to and including M16 and property classes 8.8, 10.9 and A2-70.
EN 1662:1997 history
2007EN 1662:1997/AC:2007 Hexagon bolts with flange - Small series (ISO/DIS 15071:1996, modified)
1997EN 1662:1997 Hexagon bolts with flange - Small series (ISO/DIS 15071:1996, modified)