1)density of Titanium bolts and nuts:4.51 g ... )High-grade material 5)Corrosion resist Titanium Bolts and Nuts 1. Certificate: ISO 9001, ASTM ... 3. Detailed Information Item NameTitanium Bolts and NutsMaterialPure Titanium and Alloy TitaniumGradeGr1,Gr2,Gr3,Gr4,Gr5 ... TreatmentPolishing, Anodizing, Black oxideFeatureslight weight, acid and alkali resistance, anti-corrosion, excellent mechanical strength ...