Installation 87-193

A handy person from Palo Alto CA says:
Hi, After installation how does the axle pin for the 87-193 stay in place? Is it shaped with a locking mechanism. On installation is it forced into the holes of the window's aluminum flange?
Thanks.
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Dave Sr. from SWISCO responded:
After installation, try using a soldering iron to melt and flatten the end of the axle pin.
A professional from CA says:
The axles fit tightly and are squeezed into the window frame. They take a fair amount of pressure to fit the axle in. I have not worried about them falling out.
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