Hardware parts

It appears you have an S795-33, along with a 26-040 Pivot Bar. To know what stamp option you need for this balance, you'll need to obtain the exact weight of the window sash. Also note that your balance attaches to the top of the window track with a metal hook, rather than a screw tab like our balances. Please show us the hole in the window jamb that this hook attaches to. That will clue us in as to your best way to proceed here.

With that square hole, you can use our 26-200 Screw Plug to install the standard S795-33. If your window sash weighs exactly 22.5 lbs, use a stamp option of 33C.