Truth 45251 window crank replacements

A quick learner from 68701 says:
Looking for replacements for Truth 45251 window cranks. The model 39-171 is very close, but the top split arm is 5" long verses 4 3/8" on the 45251.

Thumbnail of the uploaded file named IMG_0646.JPG
Thumbnail of the uploaded file named IMG_0647.JPG
A quick learner from 68701 says:
Another possibility may be to replace the top 5" arm on the 39-171 with the current arm and use a 62-014 rivet.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:

Please take a look at two operators similar to yours: our 39-318 and 39-388. See if you could adapt one of these to your window. The 39-171 could also possibly work, but you will need to move your sash bracket to compensate for the arm difference or swap the arm from your old operator using the 62-014 rivet. Look all the part numbers I mentioned and get back to me with your thoughts. 

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