Window Part - Security Stop for top Double Hung Aluminum Window Marking is 789 B-1

A home owner from Cinnaminson, NJ says:
August 17, 2017
Note: This plastic part is in the top window and when opened it only allows bottom window to open about 6 inches.
Handwritten number on window is 789 B-1
Aluminum window installed maybe 30 years ago.
I would like 1 dozen

Thank You Very Much,
Jim J
User submitted photos of window hardware.
Profile picture of Tom
Tom from SWISCO responded:
August 18, 2017
Hi, Jim. Take a look at our 26-338 vent lock. It looks similar to your old part. It does have a few differences, but I believe it should still work. Look over our dimensions, and let me know if you think it will fit.
Sash Stop
Sash Stop
26-338
$0.90
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