Shoulder screws for a MIAMI WINDOW CORP vintage aluminum windows

A handy person from Los Angeles says:
Screw is 1/4 in diameter and 5/8 in length below the shoulder. Course thread (5 turns looks like in the 5/8"). Shoulder is minimal (about 1/16"). I need about 20 on them.

Thanks!
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Paul from SWISCO responded:
Compare our 33-070 shoulder screw to the screw being used for Miami styled operators.
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