... or Nonstandard:Standard 4.OEM Service:Available Long Life Copper Flat Washers, Copper Gasket Copper Flat Washers Specifications1) Standard:DIN125,DIN127,ISO,ASME/ASTM,JIS ... ,JIS,BS,non standard,etc3) Material:Brass,copper,bronze(H59,H62,H68,etc)4) All head types and sizes are available5) Packing ...