... fastener Titanium nut GR1 GR2 GR5 Metric, Imperial and American Standard. flange boltTitanium Bolt,Titanium Screw,Titanium Nuts and Thread Rod (GR2 ... , GR5) Standard: DIN912, DIN933, DIN84, DIN85, DIN963, DIN7991, DIN6912, DIN931, ISO7380, ISO7380 ... above metric size, still can be imperial size and American standard.