What is this part called and how to replace it?

[Theoadd]

On the bottom right corner, the silver metal piece. There's supposed to be one on each bottom corner of this window screen but the one on the left broke off. It has a spring inside so that when you pull on it, the notch retracts from the edge so the window screen can be moved up or down. What is this? What steps can I take to get a replacement piece or screen? Thank you.

[Windows on Washington]

Tough to tell from that angle and that picture.

Tilt latch perhaps?

Any chance you can load up a better picture?