Standard Force Bronze Coil, Medium

Product Code: S175-BM

Product Description
This is a Series 175 spring for tilt windows. It moderates the operation of your window sash using a specifically calibrated coil spring that allows the window sash to stay open when raised and remain shut when closed.
  • This is a standard force spring. The bronze color indicates the strength.
  • Measures 1/2" thick.
  • Has a medium tongue, meant to install below a short coil in a coil balance system.
  • Designed to work with the 15-266 carrier, and 15-267 spring clip (sold separately).
  • This coil balance spring is sold individually, not in sets.
  • Can work for either the left or right side of the window interchangeably.
A balance assembly is used on each side of the window sash. To determine how many coils to use per balance assembly, please refer to the chart below.
Sash Weight Range Coils Per Assembly Use Coil Product Codes
4.5 to 9.9 lbs SingleS175-SS
10 to 13.9 lbs SingleS175-BS
14 to 19.9 lbs Dual S175-SS + S175-BM
20 to 23.9 lbs Dual S175-BS + S175-BM
24 to 27 lbs Triple S175-SS + S175-SM + S175-BL
28 to 34 lbs Triple S175-BS + S175-BM + S175-BL
*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.
Customer Questions & Answers
Discussion # Of Replies Last Post Date
Single hung vinyl windowThis discussion includes image(s). 4 Mar 16, 2021
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