replacement crank handles needed

A quick learner from pennsylvania says:
I have some older louvered style windows in a shed that I need to find replacement crank handles for and possibly the geared operator that the handles attach to for some of the windows. I measured the splined shaft that the handle attaches to and it looks to be very close to 5/16 diameter. It also has 12 splines. Can you tell me if there is a replacement handle available that is metal not plastic? It can be slightly shorter than the original handle (maybe 1/2" shorter at the most) Thank you for your help
Thumbnail of the uploaded file named IMG_0372.JPG
Thumbnail of the uploaded file named IMG_0373.JPG
Thumbnail of the uploaded file named IMG_0374.JPG
Thumbnail of the uploaded file named IMG_0380.JPG
Profile picture of Emily
Emily from SWISCO responded:

Hi there!

Your operator resembles our 39-234. As for the handle, take a look at our 39-121. Carefully look over the dimensions for each of these items and compare them to your current hardware to see if they can work for what you need.

39-121 : Crank Handle, 3-1/8
Crank Handle, 3-1/8"
39-234 : RH Mobile Home Operator
RH Mobile Home Operator
39-253 : LH Mobile Home Operator
LH Mobile Home Operator
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 4-7 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 856-317-6263 or at