... 12 Titanium plain washers--Gr2 titanium flat washer DIN 125 M12 Item NameTitanium FastenerMaterialPure Titanium and Alloy ... Gr5(Ti-6AL-4V),Gr7,Gr9,Gr12, etc.StandardGB,DIN, IFI,UNC,UNC,JIS, BS,BSW ,ISOSpecificationBolt: ... M64Washer: M4-M64Surface TreatmentPolishing, Anodizing, Black oxideFeatureslight weight, acid and alkali resistance, anti-corrosion, excellent mechanical strength etc. ...