Guide to Rim Nightlatches

British Standard Nightlatch British Standard Nightlatches.

Nightlatches that comply with BS3621 or BS8621 .

BS 3621:2007

This standard applies to thief resistant lock assemblies and is widely recognised as a insurance company requirement.

BS 8621:2007

This is the equivalent standard to BS 3621:2007 but applies to keyless egress nightlatches.

Auto Deadlocking Nightlatches Auto Deadlocking Nightlatches

Nightlatches with anti thrust bolts that automatically deadlock each time the door is closed.

Drawback Nightlatch Drawback Night Latches.

Nightlatches with latch and deadbolt.Latch is withdrawn by key from outside and handle inside.Deadbolt is withdrawn by key from both sides.

Nightlatch Latch

Feature latches that can sometimes be deadlocked by key,can also be held back or locked in position by internal snib.

Deadbolt Nightlatch Deadbolt Nightlatches

Feature a deadbolt rather than a latch.

Rollerbolt nightlatch Rollerbolt Nightlatches

Feature rollerbolts which prevent the door from being latched closed.

Most manufacturers make both deadlocking and non deadlocking nightlatches,what's the difference and when should you use?

The difference? Deadlocking nightlatches

such as the Yale 85 can be locked from the outside by the key meaning the the handle on the inside will be locked and it will not retract the latch,this can also be known as double locking.

Non deadlocking nightlatches

such as the Yale 91 by contrast cannot be double locked.

When to use a deadlocking nightlatch? Once a nightlatch has been deadlocked the latch cannot be slipped using the credit card trick popularised in TV and Film and so provides a higher level of security.It can also prevent burgulars from smashing a glass panel and reaching in to unlatch.

Once the nightlatch has been deadlocked from the outside the internal handle will not open the door.Therefore people could be locked inside so deadlocking nightlatches should not be used on shared or communal houses.