640 S190 Coil Balance Spring

Product Code: S190-640

Product Description
This is a Series 190 stainless steel spring for tilt-in windows. It moderates the operation of your window sash using a specifically calibrated coil spring that allows the window to stay open when raised and remain shut when closed.
  • Individually, this coil balance can hold 6 pounds. This is added together with the other coils to support the whole weight of the sash.
  • This coil is stamped with number 6 or 640.
  • Measures 1/2" thick.
  • Designed to work with the 15-180, Pivot Shoe (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.
  • Coil balances are also known as constant force window balances.
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
window balancesThis discussion includes image(s). 2 Jun 25, 2021
Number 640 marked on the coil springThis discussion includes image(s). 3 Jun 16, 2021
Need Help in Finding the Correct This discussion includes image(s). 2 Apr 28, 2021
Window Tension CoilsThis discussion includes image(s). 2 Feb 21, 2021
Single Hung window window balance parts This discussion includes image(s).This discussion includes video(s). 2 Jan 9, 2021
Replacement Part IdentificationThis discussion includes image(s). 2 Nov 11, 2020
Possible replacement of coil for constant force window balanceThis discussion includes image(s). 2 Aug 29, 2020
Coil balance springThis discussion includes image(s). 2 Aug 8, 2020
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