Pure Titanium Bolt: 1.Material: Gr1, 2, 3, 4, 5, 7, 9, 12 2.Standard : ASTM, DIN, GB/T 3.Parts: bolt and nut 4.Woodencase Pure Titanium Bolt: 1. Material: Gr1, Gr2, Gr3, Gr4, Gr5, Gr7, Gr9, Gr122. Standard: ASTM F67, F136 DIN 933, 912, 934, 7991 GB/T 13810, 3908, GB 5780~5782, 5788, 6178~61803.Size: M2~M224. Types of the Head: cheese, hexagon, pan5. Types of the Groove: slot, square socket, ...