looking for screws with tandem roller assembly

A quick learner says:
Hello,
I purchased 'Tandem Roller Assembly' part number 87-205 5/16".
Do you know which screws would likely work with this item?
Thank you
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Bob from SWISCO responded:

This really depends on the window frame more than the roller itself. If you do not have your old fasteners, we advise you contact a hardware store. Show them your window and the roller, and I think they should be able to find what you need. 

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