... ,Gr2,Gr5 1.Standard : DIN912, DIN931, DIN933, DIN985, DIN125, DIN127, DIN9021, DIN69262.Material :Gr1,Gr2,Gr5 3.Screw Varieties : the first cylindrical titanium ... screw ,titanium head screw , hexagon titanium screw , pan head screw titanium ,titanium & semi—head ...