Paul from SWISCO responded:
January 26, 2024
All the years I worked with NuPrime windows, I always used the 15-070 pivot shoe. The pivot shoe you show has a broken top that surrounds the the metal sash cam. See our video on "How to replace a tilt window balance" related on this page. The 26-028 is used for heavy sashes where the balances are under a strong strain and the the 26-028 prevents an accidental balance spiral unhooking from the pivot shoe. |