I have a 30 year old home that has tilt out double hung windows installed. I need to replace the pivot locks but I cannot locate any manufacturer's Product labels. And, I am unable to remove the pivot locks to measure the thickness. However, I did find a label with an MFGR Code AC-4 and series 2048 printed on it (see attachment). The window uses spiral balances. Will this be enough to identify the part?
Regards, Gene