1.Name:Non-standard flat washer with small holes 2 ... Carbon steel Specification of our washer: 1.NameNon-standard flat washer with small holes 2.StandardDIN, IFI ... FinishPlain, Zinc plated,Passivated, Nickle plated, H.D.G., Black Oxided, Dacromet,Geomet,etc7.Production TechniqueStamping, ... , Zinc plated,Passivated, Nickle plated, H.D.G., Black Oxided, Dacromet,Geomet,etc6.Production TechniqueStamping, ...