FB31 Auto Flush Bolts (Steel Door)

Flush bolts are usually used on a pair of double doors, like a large closet in a commercial building or French doors. These openings may have a lock on the active door, but the flush bolts allows the inactive door to be anchored to the top and bottom. The active door can then latch to the inactive door to remain secure when not in use. The FB31 is for use with metal doors only. Fully automatic — inactive door is latched, bolts are extended when active door closes. Door is unlatched, bolts retract when active door is opened. Low actuation forces, Non-handed, Bolt throw is 3/4" with a 7/8" vertical adjustment, Bolt backset is 3/4", Standard Rod Length is 12", which is measured from the center of the flush bolt body to the bolt tip. Meets ANSI A156.3 and fits standard ANSI A115.4 door frame preparations. UL Listed 3 Hour fire doors 8’0" wide X 10’0" high.

• Technical Data Sheet