Anderson window shoe
Hi there! Thanks for contacting us. If your old shoe is the same as the 36-083, the installation screws should be compatible. These screws fasten into one another. If you're still having issues, you may want to try the original screws.
Thank you for clarifying! I'm going to forward this to one of our senior experts to get his thoughts on the matter. We will reach out to you as soon as we have more information!
I'm wondering if your operator's arm has a different thread count than the new screw that comes with the 36-083. I recommend you try taking your operator, along with the new and old parts, to a hardware store in your area and see if they can check the thread count with the new screw and the threaded hole in the operator.