Tie bar guides to older Harvey casement windows

A handy person from Plymouth, MA says:
The old broken part on the left is 5/16 " and the replacement part from Harvey on the right is 7/16". Window won't close when replacement part is installed . Need a thinner guide same size as original.
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Casey from SWISCO responded:

Hello,

Take a look at our 39-448 tie bar guide, along with the video below for more information about this part. Thank you!

SWISCO 39-417 Tie Bar Guide
SWISCO 39-417 Tie Bar Guide
VIDEO
WATCH >
Anatomy of a casement window
Anatomy of a casement window
VIDEO
WATCH >
Replacing tie bar guides
Replacing tie bar guides
GUIDE
READ >
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