... AB,A 3.Size:various 4.Finish:zinc plated and so on NameSelf Tapping Screw MaterialLow carbon steel, ... zinc plated, yellow zinc plated,plain,HDG,Dacromet,and so onHeadHex washer head,Phillps flat head,Phillips pan ... curtain wall of metal light compartment and other indoor and outdoor installationAutomobile. carriages, containers, shipbuilding, refrigeration equipments all kinds of Self Drilling Tapping ...