... and nuts:4.51 g/cm3 2)type:Gr1, Gr2, Gr5 3)ISO9001:2008 4)High-grade ... material 5)Corrosion resist Titanium Bolts and Nuts 1. Certificate: ... Information Item NameTitanium Bolts and NutsMaterialPure Titanium and Alloy TitaniumGradeGr1,Gr2,Gr3,Gr4 ... TreatmentPolishing, Anodizing, Black oxideFeatureslight weight, acid and alkali resistance, anti-corrosion, excellent mechanical ...