Looks like a case of "farmer tight" somewhere along the way and it just finally failed due to metal fatigue.
I am pretty sure I have one of those screws in my parts stash, if you can send me a picture of it, preferably with a set of calipers showing the head diameter, I will take a look and send you one. I am pretty sure that there were a couple of different head sizes/styles so I would need the pic and measurement to make sure I had the right one.
Sending a PM with my cell phone # you can send the pic to.
drover
Thanks, but I've got Weaver parts coming out of my ears. I retired that set of rings, then went out the next morning and bought the exact same thing to replace it. I'll probably retire all of my old Weaver rings in the next year or so and replace them with more of the same.
Okie John