Titanium Countersunk Flush Head 1/2 - 20 x 2". Grip Length = 5/8". Thread Length = 1 3/8". 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 160Ksi and has been ultrasonic inspected. Commonly used Sprint & Midget Left Front Steering Arm to Spindle.