What screw to use with the 81-030

A home owner from Avon, NC says:

I have used the 81-030 Acorn Sliding glass door rollers for years. The original screw I have that fastens the roller to the door is too large to fit into the threads on the glass door roller.

What size/type of screw do I need?

Steve 

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Tom from SWISCO responded:

Sorry to hear that you've having trouble, Steve. The 81-030 is compatible with our 33-097 self-tapping machine screw. This should be a suitable fastener for your door.

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