(Covered In ANSI/BHMA Standard A156.16)
Chain Door Guard. A connectable device used to limit the extent to which a door can be opened.
Door Bolt or Fastener. A mechanical device operable from one side of the door and used to fasten the door in a closed position.
Roller Latch. A mechanical device used to fasten a door by means of a rolling plunger which engages a socket or catch. These have become somewhat obsolete where selfclosing or automatic closing is used due to the resistance a roller latch provides against complete door closing. They are not permitted in health care facilities under some codes.