... drilling screw 1.feature:hex head,drill-shaped point. 2.material:carbonsteel 3.finished:zinc coated 1.Standard of ... ,DIN 960/961,IS0 4014/4017,ANSI/ASME B18.2.1 IFI A101)Standard of Sheet Metal Fabrication : ... BS1210 Hardened2)Size of Sheet Metal Fabrication : M2.5-M6, 2#-14#3)Material of Sheet Metal Fabrication : 6A,8A, ... head…..Material: carbon steel C1022Size:4.0/4.2/4.5/4.8/5.0*19---60mm,Feature ...