Titanium Hex Head #10-32 x 3/4". Grip Length = 1/8" Thread Length = 5/8". The heads have been forged with 3/8" Hex Wrench, and the threads have been rolled for better fatigue resistance. Made from Titanium 6/4, ASTM B348 Grade 5 Min. UTS of 140Ksi. NAS6403