S&W part number 06219 or item number 22 on the schematic. Let me know if you have one or two, Threads came out of one while I was installing Fung Grips...
Thank you Nyteman44 for taking the time to send me the fame studs that I needed to get my 52-2 back in action... You really saved the day since I had no luck finding these at all the normal retail outlets... Here's a pic with the Fung grips in it...