... Gr1,Gr2,Gr3,Gr4,Gr5 2) various titanium bolts, nuts and fastener titanium standard part1) Material: Gr1 ... Alloy FastenerProduct Types:1.Ti Bolts & Screws: Hexagon head bolts,T-head bolts,Cup head nid bolts,Flat countersunk bolts,Double end studs,Self tapping ... screw.2.Ti Nuts: Hexagon nut,Wing nuts,Flat head ...