8759 - 8759 nightlatch, non-deadlocking


Locks for exit doors offering a high degree of security, but with unrestricted exit in an emergency. Ideally suited for hotels, factories, hospitals, schools, offices etc. Also suitable for use with electric strikes.

Can be included as part of a total security system, including mechanical and electrical devices. Striking plate is included. Cylinder and accessories bolt through lockcase for added strength. Key can only be removed in locked (or locked-back) position.

Bolt reversible without opening lockcase.

For finishes and dimensions see Lockcases Information appendix. For accessory configurations see Variations insert.

When ordering please specify door thickness.


No automatic deadlocking.

Strong spring for use with lever handles.

Available with either 50mm or 70mm backset.

May be converted by Stockists to operate with snib lock-back.




An internal microswitch can be fitted in any of these locks to enable an alarm or other signal to be activated by use of either the escape function or key and escape function.

ME = Microswitch to signal use of emergency facility or handle.

MK = Microswitch to signal use of key and emergency facility/handle.

Example Ref: 8761 (lock) / 70mm (backset) / LH outward (handing) / 4801 (cylinder) / Var 20 (emergency variation / ME (microswitch)

i.e. 8761 / 70mm / LH outwards / 4801 / var 20 / ME.

Microswitch Details:

Red: Common

Blue: Normally Open

Yellow: Normally Closed






Single Pole Double Throw. Maximum power rating 2A at 24V DC.