... service. Description: flat washer, washer1) Specification: DIN,ANSI, BS, such as DIN125,DIN9021,DIN433,DIN126,DIN440,DIN1440,DIN1441,DIN1052,DIN7349,DIN7989 ... .6-to M783) Material: Carbon steel, stainless steel4) surface finishing : plain, white zinc plated / yellow zinc plated, black finished.5) Packing:25kgs ...