Standard NBN EN ISO 2009:1995
Slotted countersunk flat head screws (common head style) - Product grade A (ISO 2009:1994)
21.060.10 Bolts, screws, studs
Specifies the characteristics of slotted countersunk flat head screws of product grade A and with threads from M1,6 to M10 inclusive. If, in special cases, specifications other than those listed here are required, they should be selected from existing International Standards, e.g. ISO 261, ISO 888, ISO 898-1, ISO 965-2 and ISO 3506.