In one picture you see your product Side latch 26-015 below my existing side latch that I am trying to find replacements for. You will notice that while the products are nearly an exact match, your product is slightly larger on the depth measurement. I think you can see this from the photo.
The second photo shows the cross section of the sash where this latch goes in. You will notice that the metal track that holds the top portion of the latch is about 1/16 inch smaller than the bottom track.
So your product is very close, but a little too thick on the depth for the top track. Your product fits correctly in the bottom track in the sash.
What can I do? I need four of these. I have one existing working side latch.
