What is the threaded screw size on the 81-126

A home owner from Chicago says:
I just purchased a 81-126 Patio sliding glass roller. WHAT IS THE SCREW SIZE OF THE THREADED SCREW THAT ATTACHES THE ROLLER TO THE DOOR FRAME? Is it 8-32 x 3/4 Phillips head? I need to buy new screws. Thank you
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Dave Sr. from SWISCO responded:

I actually think this roller uses a #7 screw to fit into the channel at the top. I tried the 33-078 flat head 3/4" long screw. It is listed as a #8 screw, but it is actually a number #7. It seemed to go in with a little bit of effort.

81-126 : Patio Sliding Glass Door Roller, Crossly
Patio Sliding Glass Door Roller, Crossly
81-126
$18.75
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33-078 : #7 x 7/8
#7 x 7/8" Flat Head Philips Screw
33-078
$0.17
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