This International Standard specifies the characteristics of hexalobular socket countersunk head tapping screws with thread sizes from ST2,9 to ST6.3 inclusive.
If, in special cases, specifications other than those listed in this International Standard are required, they should be selected from existing International Standards, e.g. ISO 1478, ISO 2702, ISO 4759-1.
SANS 1700-19-6:2003 history
2003SANS 1700-19-6:2003 Fasteners Part 19: Hexalobular socket head screws Section 6: Hexalobular socket countersunk head tapping screws