Tracking on window
Thanks for posting. I believe you are referring to your casement window's hinge set. If so, see our 36-004-10. Go over the dimensions and let me know if you think this is what you need. For new fasteners, we generally recommend you re-use what came with your old operator; if you're looking for something that matches the color of your old operator, we recommend you consult with your nearest hardware store for assistance.
I believe the new hinge you're showing in your particular photo is for the top. The other hinge that came with the 36-004-10 pair is what you want to use for the bottom. You have to replace both the top and bottom if you want ours to work. The video below should clarify how we install these.