only number on part looks like : 3557 or 3537

Question

part gets screwed on  exterior window and latch from interior window grabs the center bar (which is broken off)

Tom · Accepted Answer

I'm afraid that I don't recognize this part. Before I recommend anything, may I ask to see a photo of the lock that interacts with it? Can you also tell me the distance between those two screw holes, center-to-center? With that information I'll be in a better position to confirm if any of our products can be used as a replacement.