Milgaurd window 5220 series
Hi there!
We'd be happy to help, but we'll need a bit more information before we get started. Can you show us some pictures of your top fitting? I can only see your bottom fittings in the pictures above. Can you also tell us the stamp on your metal channel?
Thank you!
Great, thank you for the additional pictures! This helps a lot.
With this combination of fittings, you could have either an S380 or S385 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom fitting, and the Series 385 has a 1-3/32" fitting. Your bottom fitting appears to be broken so we suggest measuring an undamaged balance either from the other side of the window or from an identical window in the house.
Since there is no stamp on your metal channel, you'll need to weigh your sash on a scale in order to obtain the appropriate spring strength option. There's a chart on the S380 and S380's product page that will tell you which option you'll need based on the weight of your sash.
If you have any further questions just let us know!
