Round head
Countersunk head
Raised countersunk head
Round head with collar
Undercut countersunk head
Raised Undercut countersunk head
Low cheese head
Raised cheese
BS 1981-13-2017
Pan head screws with type Z cross recess-Table 13
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
