Need help identifying this piece

I'm afraid we don't carry this exact corner key. Parts like these were made for older storm sashes and are becoming harder to come by. This is because homeowners are replacing their old storm windows with the newer vinyl replacement windows.

That said, take a look at our 95-231 corner key. It appears to be similar to yours, but carefully look over our information to see if our dimensions match yours. You will need to adapt it by cutting off the tilt key and drilling a new hole to match the one on your corner. I cannot guarantee it will work, but we do not have anything closer.