... 3)Material:Stainless Steel Product Specification:Product Name:Stainless Steel External teeth lock washers DIN6797Standard:DIN6797Other standards:GB,DIN,JISB,ISO ... ,Screw,Pins,Washers with washers,Screw,Tapping ScrewMicro-precision screw,Circlips ,Thread rods,Studs,Rivets and so on.