CNS 4363-1980
Slotted countersunk (flat) screws for fine mechanics M0.3 to M1.4
CNS 4411-1981
Slotted countersunk (flat) head screws
CNS 9678-1982
Slotted countersunk head machine screws for precision instruments-type A
CNS 9678-1982
Slotted countersunk head machine screws for precision instruments-type C