For general purpose screw parts of M1.6 or higher, the driver used is different from the usual H type (Philips type) and the special Z type (Pozidriv type) or Supadriv type. For Z type (Pozidriv type) or Supadriv type, use a special driver (RS part number 699-8596, etc.)
Metric screws - BZP steel
Glossy galvanized and transparent passivated finish