ISO 10642:2004 specifies the characteristics of hexagon socket countersunk head screws with threads from M3 up to and including M20, with product grade A and property classes 8.8, 10.9 and 12.9.
BS EN ISO 10642:2004 history
2019BS EN ISO 10642:2019 Fasteners. Hexagon socket countersunk head screws with reduced loadability