Need help identifying these two parts

A handy person from MD says:
I will require about 10 of these screws which appear to be 3/8 of an inch long and 5/16 in thread diameter.

The white nylon guide bushing appears to be 7/8 inch diameter or so and I will need four of those.
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Bob from SWISCO responded:

See either our 10-101 or 10-109 7/8" wheels. Compare both with your old wheel to see if one could work for you. For a fastener that works with either, see the 33-087

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