Norco window crank out replacement

I am afraid I can't cross-reference those numbers to specific window operators. If you could show us pictures of the mechanisms you need, meaning the entire assembly including the link arm(s), we should be able to help you.

Again, the product numbers don't really narrow much down, and without seeing the actual operator, including the link arms, I can't totally narrow this down for you. I am assuming though these are straight arm operators like our 39-013 and 39-014 13-1/2" Straight Arm operators, as well as the 39-027E and 39-028E 9-1/2" straight arm operators. See if these match what you need. We don't have a version with a 10-1/2" arm length; in that case, I'd just use the 9-1/2" as replacement. Worst case, your windows just won't open quite as far.