Taper washer 1.Size:M2-M64 2.material:stainless steel,carbon steel,copper,iron 3.Certificate:ISO,DIN, ... Taper washer 1.Size: M2-M64 or As request 2.material:stainless steel,carbon steel,copper,iron3.Certificate:ISO,DIN,AS4 ... steel, high carbon steel, Stainless steel,copper,phosphorization, dacromet,cuprodine.Material grade A2,A4, 4.8,6.8,8.8,12.9Color ...