... ,z.p.,y.z Double countersunk head chipboard screws: sizesM5 and upfeatureslow carton,high tensile,stailessstandardDIN,ANSI ... self-drilling screws, self tapping screws, chipboard screws,machine screws,wood screws, drywall screws etc.finish bright,zinc plated,hot-dip galvanized,mechanical plated ... kinds of fasteners , such as bolts ,nuts, washers, screws, anchors and threaded rods. Our strength: Can make ...