Spline size

Quick Learner from Sterling, VA
Jul 25, 2009 1:57 pm
I need a few loops compatible with the Truth loop with U-joint, but I don't know the spline size. I noticed that you say your U-joint loop is not compatible, but I also noticed that this one fits a different spline size. Would the 39-247 work?
7 Replies

Paul from SWISCO
Aug 7, 2009 8:06 am


I believe all TRUTH products have a 11/32" spline.

Contractor from new york
Sep 13, 2009 12:33 pm
does this eyelet adapter fit an andersen awning window?

Casey from SWISCO
Sep 15, 2009 1:32 pm


No, it does not fit Andersen. The 39-247 Eyelet Adapter fits Truth and Wright brand hardware.

Quick Learner
Jul 18, 2010 5:32 pm
My skylights were purchased about 25 years ago (narrow, fit between 16" joist models). Appears to 11/32 dia shaft on crank. It is a 12 spline (grove?) model. How many splines does your model 39-247 Eyelet apadater have (or any other version you have that will work) have?

Dave Sr. from SWISCO
Jul 21, 2010 8:42 am


The shaft inside does have the 12 splines.

Quick Learner
Jul 22, 2010 8:03 am
thanks... just placed an order for 4
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