PGT WINDOW balance springs
36-9 IA2 CMC 9 is stamped in ink on the channel. The metal channel is 36" long.
What would your part number be for this item?
Steve Pierson
Hello, thank you for writing in. It looks like you will need our Series 395. However, a 3690 stamp usually indicates a length of 37", so I'd like to verify the length of your metal channel. When determining this dimension be sure to only measure the metal channel and do not include the plastic fittings.
The metal channel is 36" long.
Steve
Hi Steve, thanks for the verification. It's possible your balance was cut down during installation, and this could account for the discrepancy with the stamp. I recommend going with the S395-36, and weighing your window sash to determine which stamp you will need. You can refer to the following information:
Stamp Option - Sash Weight Range
3510 - 8 to 13 lbs
3520 - 13 to 18 lbs
3530 - 18 to 23 lbs
3540 - 23 to 30 lbs
3550 - 30 to 35 lbs
3560 - 35 to 39 lbs