... :A word trough screw and bolts 2.Grade:Gr2 3.Technique:forging,rolled,CNC machining 4.Certification: ... d, GRADE:Gr1,Gr2,Gr3,Gr5,Gr7,Gr9,Gr12 2)Difference: a, Titanium for the chemical aspects ... titanium screws include Titanium Torx Bolt,Titanium Flange Head Bolt,Titanium Countersunk Flat Head Screws, Titanium Hexagon Socket Head Knurled Screws,Titanium Nylon Lock Nut,Titanium Hex Nuts,Titanium Flange ...