I think the part number I need to order is 39-083. I think the color I need is bronze. Please see my picture. Please verify this or tell me the correct part number to order. I have measured the arm length and it is 21 1/2"
this is for a replacement. the threaded part that around the worm gear shaft on the old one is stripped out.
Will this come with some instructions on how to install it in an existing window frame, or am I on my own?
thanks
Michael