... Material:steel,stainless steel,brass,copper Finish:Plain,black,zinc plated,nickle,etc Description:Internal teeth serrated lock washers Features:1)Standard ... :DIN,ISO,ANSI/ASTM,BS,JIS,non standard2)Material:Steel,stainless steel,brass,copper3)All ... / Pallet).also according to customer`s requirements Internal teeth serrated lock washers