Titanium Hex Flange M5-.80x 8mm. Thread Length = 7mm Grip length = 1mm.This bolt has a 13mm Hex so that it can be used in location where a 8mm socket will not fit.The heads have been forged and the threads have been rolled for better fatigue resistance. Made from Aircraft grade material that has been heat treated to a Minimum UTS of 140Ksi.