Titanium flange bolts with holes Standard: Material:Pure titanium,Titanium alloy Grade:Gr1,Gr2,Gr5(Ti6al4v),Gr7,Gr9 Specification:M3-30*L6-300 Head Type:Hexagon Flange Head Drive/Recess Type:Slotted,Hex,Allen,Torx,Philips Surface Treatment