Cimmeron/Urberti 1873 Rifle/carbine Hardened Screw set.
These are not caliber specific, will fit any of these guns. The factory screws are dead soft, and you will tear them up when disassembling the rifle.
When you call Urberti, they will tell you to buy the hardened screws from VTI.
https://www.vtigunparts.com/store/shopdisplayproducts.asp?id=40&cat=uberti
I bought these, then lost them in my shop, then bought another set, then found them in my shop, right where I left them.
So, you get to save: $72 is VTI's price, but from me, $70 no shipping, no tax, cash. Part #240-H