... .thread specification:m3-m16 4.finish:galvanize Item NameFastenerMaterialPure Titanium and Alloy TitaniumGradeGr1,Gr2,Gr3,Gr4,Gr5(Ti-6AL-4V),Gr7 ... , Black oxide ColorTi natural, Gold, Blue, Purple, Green, Featureslight weight, acid and alkali resistance, anti-corrosion, excellent mechanical strength etc.ApplicationsEquipment accessories: airplane, ship ...