Cross recess
Hex chamfered single face
Hex with flange
Hex with collar
Hex chamfered double faces
Full thread
Plain washer
Large plain washer
Spring washer
Conical spring washers
In-teeth washer
Ex-teeth washer
GB/T 9074.20-2004
Cross recessed hexagon head tapping screw with indentation and large plain washer assemblies-type C
Cross recessed hexagon head tapping screw with indentation and large plain washer assemblies-type F