Replacement parts for a prism window

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Quick Learner from Charlottesville VA

Feb 9, 2026 10:59 am

I need new pivot shoes, coil springs and perhaps pivot pins for a prism window. Photos attached

3 user uploaded images

4 Replies

Emily from SWISCO

Feb 10, 2026 10:55 am

Hi there!

Thank you for reaching out to us. We're happy to look into this, but we'd like more information. Can you show us photos of the old pivot bar? That will help us confirm the best replacement option for your coil balance assembly.

Quick Learner from Charlottesville VA

Feb 10, 2026 3:09 pm

Hi Emily, Here is the picture you requested of the pivot bar. It measured 2 5/8". Thank you for your assistance

1 user uploaded image

Emily from SWISCO

Feb 11, 2026 9:03 am

Thank you kindly! This looks like an old-style Simonton pivot bar. With that in mind, we recommend you consider the 15-259 pivot shoe and Series 159 coil springs. You will also need the 26-083 pivot bar and the 15-255 or 15-256 coil supports, depending on the number of coils used per side. The video below will go over the replacement process. Take a look and let us know if you have any questions.

Note that to determine the correct coil weights, you'll need to divide the sash weight by the total number of springs used in the window.