Need operators for left and right side. Don't see any numbers or brand names.




Thanks for posting. This dual-arm operator is likely either the 39-031 and 39-032, or the 39-155 and 39-156. The difference between these two pairs is the length of the link arm. See the diagrams below. See which best matches what you have.


For both sets, you can use the 39-107 and 39-114L as new covers and handles. See the 39-505 for a new track for the straight arm. If you need new stud brackets that the link arm connects to, see our selection here.
The operators have an eletrostatically applied, durable coating that provides resistance against erosion. For your window hinges however, see the stainless steel 10" 36-004-10. If the dimensions match the hinges in your window, these should work well for you. Let me know if you have further questions about any of this hardware.




The 20810 stamp is usually associated with the 39-031 and 39-032 Operators, with the 4-7/16" link arm. If you're uncertain which handed version you need, just pop off the operator cover over the base. If the gears that move the arms are on the left side of the crank handle, then its the 39-031. If they're on the right side, its the 39-032. Let me know if you have further questions.