Spring washer 1)Material: Carbon,stainless steel 2)Size: Un-finite ... ,ZB,ZY,Nickel, ZP.else 4)Tolerance:0.01 Spring washerWhat about our spring washers? 1.StandardDIN125,DIN126,DIN9021, SAE,USS,F436 ... QUALITY:We have strict quality control from producing to delivery. Spring washer