blowout plug

blowout plug

Plugs located on aircraft skin near the installation of fire extinguishers or high-pressure gaseous oxygen. The blowout plugs release the system pressure if it rises for any reason beyond acceptable values. Colored discs in the blowout plugs, which are easily visible, indicate the operation of these plugs.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved