Round head
Countersunk head
Raised countersunk head
Round head with collar
Undercut countersunk head
Raised Undercut countersunk head
Low cheese head
Raised cheese
BS 1981-5-1991
80° Countersunk flat head screws with type Z cross recess-Table 5
BS 1981-7-1991
80° Countersunk flat head screws with type Z cross recess(truncated)-Table 7
BS 1981-9-1991
80°Countersunk raised head screws with type Z cross recess-Table 9
BS 1981-11-1991
80°Countersunk raised head screws with type Z cross recess(truncated)-Table 11
BS 1981-13-1991
Pan head screws with type Z cross recess-Table 13
BS 1981-15-1991
Recessed raised cheese head screws with type Z cross recess-Table 15
ASME/ANSI B18.6.3-2-2013
Cross recessed 80° countersunk head screws-Table 2
ASME/ANSI B18.6.3-4-2013
Cross recessed 100° countersunk head screws-Table 4
ASME/ANSI B18.6.3-6-2013
Cross recessed close tolerance 100° countersunk head screws-Table 6
ASME/ANSI B18.6.3-8-2013
Cross recessed 80° oval countersunk head screws-Table 8
BS 1981-5-2004
80° Countersunk flat head screws with type Z cross recess-Table 5
BS 1981-5-2012
80° Countersunk flat head screws with type Z cross recess-Table 5
BS 1981-5-2017
80° Countersunk flat head screws with type Z cross recess-Table 5
BS 1981-2004
80° Countersunk flat head screws with type Z cross recess(truncated)-Table 7
BS 1981-7-2012
80° Countersunk flat head screws with type Z cross recess(truncated)-Table 7
BS 1981-7-2017
80° Countersunk flat head screws with type Z cross recess(truncated)-Table 7
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
BS 1981-11-2004
80°Countersunk raised head screws with type Z cross recess(truncated)-Table 11
