I bought a fire damage auction lot on gunbroker and the frame was in it. I remover the broken hammer stud and the rebound stud the trigger stud was a different question as it was not broken. I tried to remove it anyway and well I broke it. To make matters worse I tried to drill it out with a easy out. Have not left the center of the screw so I may have chance to drill the screws minor diameter and save it yet. Would any one happen to know the male thread dimension for a smith and Wesson 1917 45 acp trigger stud?