... opened, and the falling latch is released. Automatic Flush Bolt CX06 HSK LOCKS & HARDWARES Description: Release of passive door ... bolt (see picture).Automatic flush bolts is often recommended where fire-proof demands exists.Material: Stainless Steel 304 Grade Accessories ... doors and fireproof doors, etc. ,such as latch bolt locks, dead bolt locks, night latch locks, bathroom locks and emergency escape ...