The part is for an architectural aluminum window.

A professional from Manchester, NH says:
September 16, 2015
This is a tilt tab for an architectural aluminum window.
Overall length 4 3/4"
Length of square section 2 7/16"
width of square section 1 3/8"
User submitted photo of their window hardware.
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Paul from SWISCO responded:
September 17, 2015
We have a part like yours that may be worth considering. See our 26-095 , though the total width is 4-1/4", not 4-3/4". Please review.
Die-cast Tilt Latch
Die-cast Tilt Latch
26-095
$3.07
Anatomy of a tilt window
Anatomy of a tilt window
VIDEO
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How to Replace an Internal Tilt Latch [1080p]
How to Replace an Internal Tilt Latch [1080p]
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