Slide-Co aluminum door roller from 1968 -

A handy person from Portland, Oregon says:
2 3/16" total length from back to front of roller.

1 1/4 " tall excluding roller.

1 1/2" diameter roller.

Ours has a top screw which I don't see in yours,

User submitted photos of a patio door roller.
Profile picture of Tom
Tom from SWISCO responded:
Good morning! This looks a lot like our 81-258. Check it out and let me know if this is a match.
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