You can take a look at our 26-338 Sash Stop and see if that would suit your needs.
Tom from SWISCO
Jan 25, 2012 8:00 am
EXPERT
Hey Patrick!
We just added the Swisco 26-387 Vent Lock Kit. It may be something you could use with your window.
Please take a look on our tutorial video on how to install the 26-387:
Professional from Rhode Island
Mar 7, 2012 9:16 am
I work at a nursing home and need something that allows the windows to be opened only halfway
Tom from SWISCO
Mar 7, 2012 9:42 am
EXPERT
Thanks for posting! Please take a look at our 26-387 Face Mount Single Action Vent Lock Kit, and the above tutorial video on how to install them. Do you think these would work for you?