Spline size

A quick learner from Sterling, VA says:
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?
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Paul Sr. from SWISCO responded:
I believe all TRUTH products have a 11/32" spline.
A contractor from new york says:
does this eyelet adapter fit an andersen awning window?
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Donna from SWISCO responded:
No, it does not fit Andersen. The 39-247 Eyelet Adapter fits Truth and Wright brand hardware.
A quick learner says:
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?
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Dave Sr. from SWISCO responded:
The shaft inside does have the 12 splines.
A quick learner says:
thanks... just placed an order for 4
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