DIN125:carbon steel, middle carbon steel 45#50#,stainless steel ss304,ss316 size:M2-M80 surface: Z.P/HDG/black DIN 125 washersMaterial:carbon steel,middle carbon steel 45#50#,stainless steel ss304,ss316 size:M2-M80 surface treatment:Z.P/HDG/black flat washer material:carbon steel,middle carbon steel 45#50#,stainless steel ss304,316size:M2-M80surface treatment:Z.P/H.D.G/black/plain