Titanium Cylindrical Socket Head SHCS M8 - 1.25 x 34mm. Grip Length = 18mm. Thread Length = 15mm. Head outer diameter = 13mm. The drive on this bolt is a 6mm Allen key. The heads have been forged and the threads have been rolled for better fatigue resistance. Made from aircraft grade material that has been ultrasonic inspected and has a minimum UTS of 140Ksi (925Mpa).