Looking for correct replacement spring balances.

Question

These coil balance springs are 1/2" wide. There are numbers denoting the weight and length (see pictures). I tried using #S160-05 and they were too short, although otherwise correct.The extended length needed is approx.53". It is for a tilt-in double hung with overall height of 58". I believe they are Simonton brand from the mid 1990s.

Tom · Accepted Answer

I'm afraid that they don't make coil springs as long as you need anymore. Longer springs was the industry standard for a long time, but somewhat more recently the average travel length was cut in half. Almost all springs made today are 30"-40" long.

Our S160-05 should still work for you, but you'll have to install it lower in the jamb you make up the difference. Just make sure that wherever you install it is lower than the tilt latch's lowest resting position, to ensure that it doesn't interfere with window operation.