titanium socket head cap screws:DIN912, DIN931, DIN933, DIN985, DIN125, DIN127, DIN9021, DIN6926 Titanium socket head cap screws : Titanium and Titanium alloy specifications: 1)Common Ground a, Bolt ... .The kinds of titanium screws include Titanium Torx Bolt,Titanium Flange Head Bolt,Titanium Countersunk Flat Head Screws, Titanium Hexagon Socket Head Knurled Screws,Titanium Nylon Lock Nut ...