I have a rolling patio screen door. The corner piece that holds the frame together is a cast white iron corner piece. Looks like your part number 95-227 or 95-248 (not sure the difference?)
The old parts are stuck in the frame and not sure what holds them? Just friction fit? how to get them out?
Take a look at the video below. This should help you remove the hardware in question. Once you have the hardware off, you should be better able to match up our hardware to yours.
A quick learner from Richmond Hill says:
April 20, 2015
Very helpful. Thank you, I got the parts out and have found replacements. Will be assembling the door this weekend, hoping for a good result.