... , yellow zinc plated,plain,HDG,Dacromet,and so onHeadHex washer head,Phillps flat head,Phillips pan headPackingless than 25kgs bulk into carton, then ... , galvanized steel, engineering, installationmetal curtain wall of metal light compartment and other indoor and outdoor installationAutomobile. carriages, containers, shipbuilding, refrigeration equipments flat head ...