... Can be made of low carbon steel and high tensil spring washer sizesM5 and upfeatureslow carton,high tensile,stailessstandardDIN,ANSI,BSW ... ,AS,JS,ISO,ETC.stype Flat washer and spring washerfinish bright,zinc plated,hot-dip galvanized,mechanical plated ,nickel ... specializes in producing many kinds of fasteners , such as bolts ,nuts, washers, screws, anchors and threaded rods. Our strength: Can ...