CNS 4418-1981
Countersunk square bolts with long square
CNS 4417-1981
90° Countersunk head nib bolts
CNS 4417-1981
60°Countersunk head nip bolts
CNS 4420-1981
Countersunk head bolts with forged slot for steel structures
CNS 4573-1981
8°Countersunk bolts for drawing instruments
CNS 4698-1982
Countersunk double-rib bolts counter sinkings for agricultural equipment