Awning replacement crank help

Question

I am trying to figure out the appropriate crank for the awning style glass windows of my porch. The cranks and the windows unfortunately do not have any markings. I have removed 1 crank to take accurate measurements and the photos that I have attached. I initially thought part 39-017 would be correct as the extension and distance between the screws fit but noticed that this model has 2 attachment screws at the top while mine has 1 at the top and 2 at the bottom. The screw holes on the aluminum window frame are threaded so changing them would challenging.

Also it seems from the product photos that the connection hole on the extension arms are smooth- my model has a piece that is threaded and slips into the actual window awning mechanism- without this piece there is no way to attach the crank- is this part sold separately? I have included a photo of this particular piece.

I included measurements in the photos but will list them here also:
extension arm 2 3/8"
length top to bottom from center of screws 51/4" total height 5 7/8"
bottom screws from center to center 1 1/4" apart.

Any help you give in identifying the correct parts would be appreciated. Thanks!

User submitted photos of a window operator.

Dave Sr. · Accepted Answer

Thanks for posting! Take a look at our 39-025 operator. This might be the one you're looking for, but just double check the bottom hole centers. You say yours are 1-1/4", whereas the same measurement for the 39-025 is at 1-1/8". We also have a helpful video.