Bommer
4 x 4 x 1/4 Radius Heavy Duty Spring Hinge, Pair, Bommer LB4311C-400
The Bommer LB4311C-400 is a heavy-duty spring hinge pack, including a pair of 4" x 4" hinges with a 1/4" radius. This unit features tension adjustment and comes complete with all necessary installation hardware.
Constructed from durable steel with .130 gauge metal, these hinges are UL Listed (R-4667) and certified Grade 1 for fire door applications, rated for 1 million cycles.
The package includes tensioning tools, locking pins, #12 x 1-1/4" wood screws, and #12-24 x 1/2" machine screws, allowing installation on wood or metal door frames.

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