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Dorma 9300
but it also shows nearly zero droop or wobble after 16 million cycles
Bottom of door only
Heavy-duty springs for better lever return and to prevent sagging
ASTM E2074-00
FB51P-12-MD Constant Latching Top and Bottom Flush Bolt Pair for Metal Doors Finish:Oil Rubbed Bronze Dorma 9300Ives FB51P 12 MD Constant Latching Top and Automatic Bottom Bolt, 12" Rod, Metal Doors Constant Latchinginactive door remains latched until the active door is opened, releasing the automatic bottom bolt, and then the top bolt can be manually released. The inactive door will relatch automatically when closed. For use with hollow metal doors only Low actuation forces Non handed. Bolt throw is 3 4" with a 7 8" vertical adjustment. Bolt backset is 3 4"
US$ 94.29
US$ 16.83
US$ 33.71
