... .Standard:DIN,ANSI,BS,JIS,GB Item NameJL-SCR-032 Round WasherMaterialIron, Brass, Carton steel, Stainless steel, Alloy steelSurface TreatmentChrome plating ... , Rivets and etc.2. by head typesFlat, Oval, Binding, Pan, Round, Truss, Button, PF, Pan washer, Cheese, Countersunk, Fillister, hexagon, Hexagon ... treatment that are suitable for your productswww.jielimetal.com.cn Flat Round Washers JL-SCR-032