I snapped the ejector rod housing screw off of my OM 357 Blackhawk... I tried using one off of my new model SS Bisley and it fit perfectly. I ordered 4 screws from Ruger parts (2 blue / 2 SS) and gave them the serial number for my Bisley. They sent them free and I put a blue one in my gun..... perfecto. In case you need them: KXR03302 (new part number for blue screws) and KXR03301 for SS.
John
John