Round head
Countersunk head
Raised countersunk head
Round head with collar
Undercut countersunk head
Raised Undercut countersunk head
Low cheese head
Raised cheese
GB 945-1976
Cross recessed fillister haed screws
BS 1981-15-1991
Recessed raised cheese head screws with type Z cross recess-Table 15
BS 450-7-1958
Cross recessed cheese head screws-Table 7
BS 1981-15-2004
Recessed raised cheese head screws with type Z cross recess-Table 15
BS 1981-15-2012
Recessed raised cheese head screws with type Z cross recess-Table 15
BS 1981-15-2017
Recessed raised cheese head screws with type Z cross recess-Table 15
