... .5,4.0,5.0,6.0mm... packing;1000pc/box,500pc/box,25kg/carton CHIPBAORD SCREWRaw materialC1022Diameter3.5mm,4.0mm,4.2mm ... ,100--180mm)ShankThread( standard)SurfaceZinc plated ( yellow, white)Packing1000pc/box,500pc/box,10kg/carton,20kg/carton,25kg/carton CSK head chipboard screw