Screen door adjustment screws.

A quick learner from Canada says:
August 31, 2018
I have a friend with a 48? X 78? sliding screen patio door that is missing 3 adjustment screws, the 4th doesn?t seem to do anything and is binding and warping because the wheels are all slightly dysfunctional.
Can you recognize these and suggest replacements and how to swap.
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Dave Sr. from SWISCO responded:
September 11, 2018

I'm not sure if you can get the adjustment screw that goes with your patio screen door. It is a very specific screw. It should be a #8 Round Phillips head screw, 2-1/2" long with a blunt tip. 

I recommend getting the one screw you still have in the 4th corner and take it to a hardware store in your area to see if they can supply. I believe the roller and corner in your door will be our 84-108 and 95-248, but you may want to remove your hardware from the door to confirm they all match up.
Screen Door Roller Pair, Nylon
Screen Door Roller Pair, Nylon
84-108
$7.97
Patio Screen Door Corner
Patio Screen Door Corner
95-248
$4.20
How to Replace a Sliding Screen Door Roller [1080p]
How to Replace a Sliding Screen Door Roller [1080p]
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How to Replace a Screen Door Corner and Roller [1080p]
How to Replace a Screen Door Corner and Roller [1080p]
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