BSI Channel Balance and Window Hardware

Question

Hello,

I need to replace two BSI channel balances for my window, along with the plastic hardware that screws into the top of the window pane.

The channel balance is stamped with "31 C". The metal frame measures nearly exactly 32 inches (photo included).

Unsure of the name of the plastic tab that screws into the top of the window to retain the channel balance, but it has broken off and also needs replaced (picture of broken tab included).

Thanks in advance!

Eric

Jasmine · Accepted Answer

Hi Eric,

Thanks for reaching out to us! Your balances appear to be either the S380-32 with a 1" shoe or the S385-32 with a 1-3/32" shoe. Each of these channels are 32" in length with a 9/16" width (which is considered 1/2" in the trade).

To determine which series is needed for your window, look over the dimensions from the diagram below to confirm the depth of your bottom shoe. Keep in mind, there is a chance that it could measure 7/8". If so, please let me know as these will need to be a custom assembly.

You'll need to select the 3130 stamp option. Although, it may be a good idea to make sure the weight of your sash falls between 16 to 23lbs.

Comparison of the S378, S380 and S385 balance shoes.