Round head
Countersunk head
Raised countersunk head
Round head with collar
Undercut countersunk head
Raised Undercut countersunk head
Low cheese head
Raised cheese
BS 450-8-2012
Cross recessed mushroom Head Screws-Table 8
BS 450-8-2017
Cross recessed mushroom Head Screws-Table 8
BS 450-11-2012
Cross recessed 90° countersunk flat head screws-Table 11
BS 450-11-2017
Cross recessed 90° countersunk flat head screws-Table 11
BS 450-12-2012
Cross recessed 90° oval countersunk flat head screws-Table 12
BS 450-12-2017
Cross recessed 90° oval countersunk flat head screws-Table 12
BS 450-13-2012
Cross recessed round Head Screws-Table 13
BS 450-13-2017
Cross recessed round Head Screws-Table 13
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
BS 1981-11-2012
80°Countersunk raised head screws with type Z cross recess(truncated)-Table 11
BS 1981-11-2017
80°Countersunk raised head screws with type Z cross recess(truncated)-Table 11
