Corner keys identification

A quick learner from MA says:
Corner keys from screen on American Craftsman 3150 Casement Window.
Marked 539.
Legs measure 31/64" x 17/64"
User submitted photos of window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Please see our 93-246. I think this may be a match, but compare it to your part to confirm.
A quick learner says:
Looks like a winner. Thanks.
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