... , 6178~61803.Size: M2~M224. Types of the Head: cheese, hexagon, pan5. Types of the Groove: slot, square socket, phillips recess6 ... bolt and nut8. Intrinsic Quality: No organization segregation, no high density of its impurities9. Fine texture:A1~A410. Usage: Aerospace, spaceflight, ... surgical implants, chemical industry, as the parts of the cars,the bikes pure titanium bolt