S. Parker Hardware 1200 Series Spring Door Hinges Are Used For Doors Requiring Automatic Closure.
Spring door hinges use energy stored in the coiled spring during the opening swing to close the door. For doors up to 60 lbs, use one UL and two same-size ball bearing hinges. For doors up to 110 lbs, use two UL hinges and one same-size ball bearing hinge. For doors to 160 lbs, use three UL hinges. For larger doors, use four UL hinges. UL Template Spring Hinges measure 4-1/2x 4-1/2 and are available in a variety of finishes. Spring Butt Hinges feature rounded corners and are available in 4x 4 or 3-1/2x 3-1/2 sizes.