chipboard screw C1022 material yellow & white zinc plated Dia:3.5,4. ... .0,6.0mm... packing;1000pc/box,500pc/box,25kg/carton COUNTERSUNK HEAD CHIPBAORD SCREWRaw materialC1022Diameter3.5mm,4.0mm,4.2mm,4 ... /box,500pc/box,10kg/carton,20kg/carton,25kg/carton chipboard screw, wood screw