... Dia.:3.5m~6.3mm 4) Material : Carbon Steel C1022 or C1018, or stainless steel. 5)Finish:Zinc Plated ,painting dacromat. ... Hex Washer Head, 8mm AF, Flash drill ,SDS #5 point, cut thread ,Sandwich Panel Self Drilling Screw, C-1022 Steel, Case ... Steel THK=0.6mm, Grey EPDM THK=3.0mm), ,Heated treatment, Head Mark ,Bulk Packing . We mainly manufactures various series of self drilling and tapping screws with ...