... head machine screws with collar, ,Hexagon nuts with flange, Hexagon socket set screws, and any other according ... customer's drawwing Item NameTitanium FastenerMaterialPure Titanium and Alloy TitaniumGradeGr1, ... M64Surface TreatmentPolishing, Anodizing, Black oxideFeatureslight weight, acid and alkali resistance, anti-corrosion, excellent mechanical strength ...