fire-exit bolt

fire-exit bolt

[′fīr ‚eg·zət ‚bōlt]
(engineering)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

panic exit device, fire-exit bolt, panic bolt, panic hardware

panic exit device
A door locking device used on exit doors; the door latch releases when a bar, across the inside of the door, is pushed.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.