Hello gentlemen, Its been awhile since I last posted here. I recently bought a 4" 686-6 .357 magnum, and I am delighted in it. However, when I was taking it apart and cleaning it up, I defaced the thumbpiece / latch nut slightly with my screwdriver. I figured this would be a few dollars replacement, but instead I cant even find the item online? I'm really busy and dont have a lot of time to hunt stuff like this down. A quick link would be greatly appreciated. Thanks guys!