Round head
Countersunk head
Raised countersunk head
Cheese
Round head with collar
Undercut countersunk head
Raised Undercut countersunk head
Low cheese head
Raised cheese
Cheese with hole
Countersunk Cheese head
Large cheese head
BS 1981-4-1991
80°Slotted countersunk head screws-Table 4
BS 1981-6-1991
80°Slotted countersunk head screws(truncated)-Table 6
BS 1981-4-2004
80°Slotted countersunk head screws-Table 4
BS 1981-4-2012
80°Slotted countersunk head screws-Table 4
BS 1981-4-2017
80°Slotted countersunk head screws-Table 4
BS 1981-6-2004
80°Slotted countersunk head screws(truncated)-Table 6
BS 1981-6-2012
80°Slotted countersunk head screws(truncated)-Table 6
BS 1981-6-2017
80°Slotted countersunk head screws(truncated)-Table 6
