... , 3, 4, 5, 7, 9, 12 2.Standard : ASTM, DIN, GB/T 3.Parts: bolt and nut 4.Woodencase Pure ... , Gr5, Gr7, Gr9, Gr122. Standard: ASTM F67, F136 DIN 933, 912, 934, 7991 GB/T 13810, 3908, GB 5780~5782, 5788 ... : slot, square socket, phillips recess6. Screw Varieties: titanium cylindrical screw, titanium head screw, titanium pan head screw , titanium square head screw titanium hexagon srew, titanium slot word ...