777 Series

The 777 series is a standard mount B&T system. This series is ideal for windows with a balance cover, as it can fit behind and be hidden out of site. This system is ideal for new construction and replacement windows.

product highlights

  • Recommended for:  aluminum, composite, vinyl, and wood
  • AAMA 902 Certified
  • Traditional lace with full travel up to 45 lbs.
  • 1" or 1.25" locks available
  • Side locking and back locking shoe options available
  • Standard mount 5/8" balance
  • Can accommodate weights from 3 lbs. to 45 lbs. and can be used with or without balance covers
  • Shipped completely assembled ready to install


Attribute Value
Weight Capacity 5 - 45 lbs (60 lbs Limited Travel)
Length Range 12" - 45"