Yale Locks Nightlatch - Multicolor

BS 3621:2007 is a British Standard that specifies the requirements for locks intended to resist common burglary methods. Locks meeting this standard are recognized for their high level of security.

The backset is the measurement from the edge of the door to the center of the lock's cylinder or keyhole. A 40mm backset is specifically for doors where there is limited space on the edge, often found in older doors or those with decorative elements.

This nightlatch is designed and recommended for timber external doors. Installation on other materials may not be suitable and could compromise security or performance.

The snib function typically involves a small lever or button on the interior side of the lock that, when engaged, holds the latch bolt retracted so it doesn't automatically lock when the door is closed. Consult your specific installation manual for precise operation.

The Yale BS2 Nightlatch comes with a 10-year guarantee.

No, this specific model is designed for timber doors and has a 40mm backset. Locks for UPVC doors typically have different mechanisms and dimensions.

Yes, the lock is operated by a key from the outside. From the inside, it can be operated by key or the lever handle.

Ensure the door is closing fully and not catching on the frame. Check for obstructions that might prevent the bolt from engaging.

Ensure the correct key is being used and is fully inserted. Check for debris inside the keyhole. If issues persist, professional inspection may be needed.

Verify that the snib function is not engaged in a position that prevents locking. Ensure the internal mechanism is not obstructed.

Check for any damage or misalignment of the bolt or strike plate. Clean and lightly lubricate the bolt mechanism with a graphite-based lubricant.