S351-21

21" Series 351 Channel Balance

Product Code: S351-21

$9.59/each

Quantity	Price
1-11	$9.59
12-49	$8.63
50-99	$8.15
100-249	$7.67
250+	$7.19

Please Note: Bulk pricing applies only to purchases of the same option

Discounts starting at 12 pcs.
View Bulk Pricing

How to measure the length of the Series 351 channel balance.

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
2060	27 to 30 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 is a code that indicates how much weight a pair of balances can support. You can use the stamp on your original channel balance as a reference in most cases, or you can weigh your sash and refer to the chart above. If your sash’s weight falls outside the weight ranges listed on that chart, or you are still unsure how to proceed, ask our experts for help.

Guides

How to replace a channel balance

Related Item(s)

15-002

$0.74

Channel Balance Shoe, 1" Depth

Channel Balance Top Guide

Customer Questions & Answers

Discussion	# Of Replies	Last Post Date
Milgard Channel Replacement	2	Mar 18, 2023
Balances	2	Jan 13, 2023
window balance	2	Dec 8, 2022
Parts	2	Nov 28, 2022
Help with identifying a channel balance	2	Nov 14, 2022
21 inch metal frame by five inch wide. Came out of a western insulated glass aluminum frame from approximately 1980 to 85	2	Jun 23, 2022
Numbers 2030. Length 21 inches	2	Jan 19, 2022
Searching for 20 5 fBST	2	Dec 26, 2021

See all discussions

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.

You are a:
Located in:
Email:	(your email address will be kept private and is only used to inform you when a response has been made)
Subject:
Post:

Images:
	Current wait time is 3-4 business days We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.