Like the others said. soak with P B Blaster for at least 30 min, Tap straight on with 1/2 in. brass rod . Then angle a large screwdriver in the counterclockwise direction to the slot and tap. It should come on out. If not tie a rag soaked in penetrating oil onto it and leave a few days, then try again. Its a really short screw. When ya get it out sling that b***h a flying!!