21" Series 351 Channel Balance

Product Code: S351-21

21" Series 351 Channel Balance
Main product image of the S351-21 21" Series 351 Channel Balance
Measurements of 19-002 top balance shoe.
Measurements of 15-002 bottom shoe.
How to identify a replacement channel balance
How to Replace a Non-Tilt Channel Balance
How to Repair a Jammed Window
$8.95/each
Quantity Price
1-11 $8.95
12-49 $8.05
50-99 $7.61
100-249 $7.16
250+ $6.71
Please Note: Bulk pricing applies only to purchases of the same option
Option:
2010
2020
2030
2040
2050
add $0.75
Product Description
This is a Series 351 channel balance for non-tilt windows. It moderates the operation of your window sash using a specifically calibrated spring and pulley system that allows the window to stay open when raised.
  • This balance has a 21" long metal channel. When determining the length, do not include the attached fittings. Only measure the metal channel.
  • Comes fully assembled with the 19-002 top and 15-002 (1" deep) bottom fittings and will be ready to install out of the box.
  • The strength you need should be indicated as a stamp or imprint on your old metal channel. If you do not have a stamp, or cannot match it up to our options, weigh your sash on a scale and refer to the chart below.
  • The width of the metal channel measures 9/16" but is considered 1/2" in the trade.
  • Can work for either the left or right side of the window interchangeably.

  • Stamp Option Sash Weight Range
    2010 5 to 8 lbs
    2020 8 to 12 lbs
    2030 12 to 15 lbs
    2040 15 to 23 lbs
    2050 23 to 27 lbs
    *This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
Good Idea!
Balances are sold individually, however, it is a good idea to replace both window balances at the same time. Pairing a new balance with an old one would cause the new balance to wear out faster.
Helpful Tip!
The stamp option represents the strength of the channel balance. Locate the stamp on your channel balance. If your stamp does not match any of the stamp options available or you are unsure of which stamp option you should choose: ask our experts for help.
Guides
Customer Questions & Answers
Discussion # Of Replies Last Post Date
Not sure what size channel balance this isThis discussion includes image(s). 2 Nov 26, 2019
21" metal and 7/16" thickThis discussion includes image(s). 4 Nov 19, 2019
2090 18 channel balance This discussion includes image(s). 2 Nov 10, 2019
Searching for balances 20 1 hu cmc 5This discussion includes image(s). 2 Aug 28, 2019
Is Channel Balance 20C Stamp Code same as 2030? 2 Jul 18, 2019
21'' by 1/2'' balancer 2 Jul 9, 2019
Broken window track This discussion includes image(s). 4 Jul 4, 2019
Identify Window Channel Balance This discussion includes image(s). 2 Jul 3, 2019
Start a new discussion
Use this form to ask questions or to share your experiences regarding this product. Every discussion will be reviewed and answered by our experts.
(your email address will be kept private and is only used to inform you when a response has been made)