Screen corner keys

A quick learner from CA says:
Per attached photo, I'm looking for replacement keys for screens provided by Sierra Pacific Windows. The keys seem normal 3/4" but the tubing used for the frames has a profile that may be unusual. I've attempted to draw the interior sizing. Tube is 3/8" x 1/2" with a flange or tab width of 9/16" Let me know if you need other measurements. The keys lave a logo "TF" and numbers such as 29 and 16.

User submitted photos of a corner key.
Profile picture of Paul
Paul from SWISCO responded:
Good morning, Al! Thanks for posting. I recommend that you take a look at our 95-035 Outside Screen Frame Corner. This appears to match your dimensions. Take a look and let me know what you think!
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