looking to replace window crank and arm

Thanks for your post! This window operator appears to be a match for the 39-221B Encore Dyad Sill Mount Operator. To determine if this is the correct match, carefully look over the specifications and compare them.

If you are in need of a replacement for the sash bracket, I believe you may have the 39-508 but you'll need to compare the specifications on to be sure. they can be found on the website.

The other compatible hardware and accessories can be found tagged below this thread.

detail of 39-221B