External teeth serrated lock washers Material:65Mn spring steel,stainless steel Finish:Plain,ZP,YZP,Black,HDG,Nickel External teeth serrated lock washersMaterial: Carbon steel, mild steel, stainless steelFinish:Plain,ZP,YZP,Cr3+,Cr3+,Black,HDG,Nickel,ChromeSize:M3-M80Package: Carton packing or wooden packing .OEM/ODM order are welcomeDrawings, samples or other special requirement is avaliableOur ...