... ZW,ZB,ZY,Nickel, ZP.else 4)Tolerance:0.01 Square Washer 1) Standard: DIN, BS, IFI, JIS, ISO ... to your request.6) Surface Condition: remove all burs and sharp edges.7) Packing: Carton, Box, Bag, ... for us.9) Working Process Include: cold punching, and machining, also CNC machine, can do OEM order.10 ... have over than 10 years of experiences in producing and supply washers, 80% of our products are exported ...