... 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 , ... Our presence: ElectronicsHome & Industrial AppliancesIndustrial Tools and MachineriesAutomotiveMedical EquipmentsMilitary Spring washers