Stressed screws on lathe chucks

I noticed the jaws on this chuck were loose and sheared a screw tightening it (I don’t think I was using too much force). I checked the other screws and noticed another one had clear signs of stress and was about to give.
I don’t know what to do with this information, but I figured I’d pass it along.
Do I need to buy more screws? If someone can send me a link I can order some more.