Are alot of SAA grip frame screw patterns a universal fit? Colt to Uberti to Ruger to Cimarron to.........?
From what I know, Uberti fits Colts and the Hy Hunter. (Cimarron is Uberti) In the case of my Hy Hunter, the trigger guard was Uberti, the backstrap for a Hy Hunter.
Since the trigger guard was Uberti, I had to fit a Uberti mainspring screw, since I couldn't use the Hy Hunter screw. All the screws into the frame were Hy Hunter. And for the most part, Hy Hunter and Hawes parts are interchangeable.
I had to chase the threads for the mainspring screw, and was surprised to find they were 10-24 UNC.
I had the Uberti trigger guard in my parts box, and I tried it with the original backstrap first, before ordering the brass backstrap. Not too, that the screw at the butt has to be a Uberti part:
The parts were not a perfect match, had to do a little filing.
Before:
And, after a little fitting:
Bob Wright