D457 - D457 escape nightlatch with lockable handle

Application

Escape nightlatches are suitable for applications where single action escape is needed. The lockable handle allows free passage in both directions when required, and security at other times. Ideal for classrooms, offices, etc.

Available with single cylinder and thumbturn. Uses Euro profile cylinders.

Supplied as standard with striking plate. Both square and round faceplates are available.

Key can be removed in locked or unlocked position.

Split follower lock: incorporates different and separate functions on either side of the door.

For finishes, handing and dimensions see Lockcases Information appendix.

When ordering please specify door thickness.

 

Specification

Bolt deadlocks automatically when door is closed. Internal lever operates at all times. Cylinder may be used to lock the external handle to prohibit access by non-keyholders during controlled periods.

Split follower lock; requires lever furniture with split spindles.

Both bolt and escape follower are reversible without opening lockcase.

Available with 60mm backset.

 

Exterior	[PROD3]	Interior
Lever handle retracts latchbolt when not locked. Latchbolt automatically deadlocked.  Key locks or unlocks handle.		Lever handle giving free passage at all times. Thumbturn locks or unlocks external handle.

 

Finish

Product has been successfully type-tested for conformity to BS EN 12209.
Regular audit testing is undertaken.
Product has also been successfully type-tested for conformity to BS EN 179 in conjunction with an ASSA Aluminium 1325 lever handle. Regular audit testing is undertaken. Classification: 3 7 6 B 1 3 5 2 A B/D.

Standards