Dave Sr. from SWISCO responded:
January 5, 2016
I believe the 40-038 should work on a 1-1/2" thick door. The normal spindle length for a 1" door is cut at 2-1/8" long, but the 40-038 is 2-7/8" long. If you want to confirm, though, I would like to see a picture of your original spindle so that we can identify the correct part. I would also like you to tell me your length measurement.
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