Sash stop

A quick learner says:
February 19, 2024
My sash stop broke but when I went to remove it there is a second screw witch is broke off?
It is same on the other Sash stop also.

Is this some kind of secondary securing method.

I have seen something like this in automotive repair. I believe it was some kind of bolt that breaks at a specific torque.

Thanks Mike
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Emily from SWISCO responded:
February 21, 2024

Hi there Mike.

Thank you for reaching out to us. I'm afraid it's hard to get a good look at your sash stop from this photo. Would you be able to remove it and show us a few photos? I can't promise we'll be able to help but that should help us confirm. 
A quick learner says:
February 21, 2024
That's the problem the top screw you can remove but the bottom screw does not have a head. Same on the other side. It looks like they are intentionally remove.

Mike
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Dave Sr. from SWISCO responded:
February 23, 2024

Your top sash guide reminds me of the 18-179. Have a look at the specifications and see how they compare with your old part.

I'm not sure if you need that bottom screw to install the top sash guide though. If you don't have to remove it, the better. You would need to remove the glass from the sash and take off the top rail off the window most likely to access those screws to remove them. If you can install the top sash guides and the window operates then it may be best to leave it well enough alone. 
Top Sash Guide
Top Sash Guide
18-179
$2.20
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