Replacing crank handles with T cranks

A quick learner from Gaylord, MI says:
I would like to replace the remainder of my crank handles with T cranks so I can put my three new shades down. The number on the original cranks are 40085. The t-cranks shown, are the same spine size as 40085 and I have them on five other windows. I just don't know the manufacturer and spline size. I measured the spines and theyseem to be 5/16". Can you suggest the proper spline size to order? I need to purchase three of them.

Thanks!
Thumbnail of the uploaded file named IMG_0235.jpg
Thumbnail of the uploaded file named IMG_0236.jpg
Thumbnail of the uploaded file named IMG_0237.jpg
Profile picture of Tom
Tom from SWISCO responded:

We unfortunately don't have a T handle with a 5/16" hole size. Can you double check that for me? It's important to be as precise as possible; there are a bunch of different sizes but they're all very close together, so it's easy to get them mixed up. For example, there is a chance the hole diameter is 11/32", which is a common size for Truth brand parts especially. 

If it is 11/32" then you could use our 39-102.

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.