Got he screw pin and the remaining plastic out last night. After being there for 66 years, it did not come out easily, the screw pin was lightly rusted and the plastic was really stuck in the threads. Lightly ran a tap down the threads (5/8" - 10) and the new nose piece fits perfectly. I too am not going to put the pin back in, but might use a little clear silicone to keep the orientation.