... titanium fasteners, nuts, bolts, washers, machine screws, rivets, pins made of refractory and special metals, such as cp titanium,6 Al-4V titanium, in DIN ... ,DIN934,DIN 7991,DIN 965,DIN 966,ISO7380,DIN 985,DIN9623,DIN125,DIN127,DIN6923 5)Grade:Gr1,Gr2,Gr3,Gr5,Gr7,Gr9,Gr12,Gr23 titanium screws ...