Andersen tandem sash part

A quick learner from Indiana says:
Looking foran Andersen tandem sash (LH) that is 41" long point to point. The part # on the keeper says it is 135143 but your equal part online shows it at 29 1/2". I also included a photo that ahows 7=LH, 8=RH?
Please help!
Thumbnail of the uploaded file named 15954633759415360352614532364125.jpg
Thumbnail of the uploaded file named 15954634497861393741093377685528.jpg
Thumbnail of the uploaded file named 15954635110227129076474210511133.jpg
Profile picture of Tom
Tom from SWISCO responded:

This looks similar to our 38-146 Andersen brand single lock. Could this be what you're looking for? It's compatible with the 39-291 lock handle.

A quick learner from Indiana says:
Im looking for the Andersen tandem lock for a casement window. It measures 41" from tip to tip and the glass daylight opening is 55". The one on your website shows it to be 40" and it is a LH.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:

I took one of the 38-149 long locks out of stock to check the numbers marked on it and they match up to yours. #135143 and the #7=LH and #8=RH. Take a look at the 38-149 and compare the dimensions with yours. I think this may be just what you wanted.

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