Round head
Countersunk head
Raised countersunk head
Round head with collar
Undercut countersunk head
Raised Undercut countersunk head
Low cheese head
Raised cheese
BS 1981-9-1991
80°Countersunk raised head screws with type Z cross recess-Table 9
BS 1981-9-2004
80°Countersunk raised head screws with type Z cross recess-Table 9
BS 1981-9-2012
80°Countersunk raised head screws with type Z cross recess-Table 9
BS 1981-9-2017
80°Countersunk raised head screws with type Z cross recess-Table 9
GOST 17474-1980
90°Cross recessed rasied countersunk head screws
GOST R50406-1992
90°Countersunk raised head screws
GOST R50406-1992
90°Countersunk raised head screws
