Will 18-188 replace my Milgard part?

A handy person from Denver says:
May 31, 2020
The part I need is very similar to the 18-188 top sash guide. It is for a Milgard window which is probably 15 years old. The sizing is exact except for 2 differences.
1. In the second picture, the depth measured at the top of the piece we have is 5/8" vs 1/2" on the 18-188
2. In the same picture, the depth measured at the bottom of the piece we have measures 3/8" vs 9/32" on the 18-188.

Will your 18-188 piece work?
Mike
Profile picture of Paul
Paul from SWISCO responded:
June 4, 2020

I suggest you use the 18-009 top sash guide and trim the three thin plastic edges at the top of the guide where they protrude past the main body of the guide. I've done this before and found it was an easy solution that works perfectly for the Milgard non tilt window.
5/8" Top Sash Guide
5/8" Top Sash Guide
18-009
$0.99
How to Repair a Jammed Window
How to Repair a Jammed Window
VIDEO
WATCH >
How to Replace a Top Sash Guide [1080p]
How to Replace a Top Sash Guide [1080p]
VIDEO
WATCH >
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 3-4 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.