5/16" Plastic Screen Corner with pull tabs and mounting holes
A professional from McMurray, PA says:
July 25, 2015
Unknown make. No markings/tags on screen. Unknown if marks are on window. Similar to your 95-186 but legs are longer and reverse side has what appear to be functional mounting site.
Paul from SWISCO responded:
July 29, 2015
Thanks for posting. The length of the leg is actually not critical. The height of the leg is 9/16" and the thickness is 17/64". These area the two most vital measurements. How do they compare to yours?