The Yale Deadlocking Nightlatch 40mm in chrome finish is a compact and reliable security solution designed for inward-opening timber doors. Known for its durable construction and smooth operation, this nightlatch is ideal for homeowners looking for added front-door security.

With a 40mm backset, it is well-suited for doors with narrow styles, commonly found in older homes or where space is limited. Its polished chrome body delivers a modern aesthetic while ensuring robust protection.

Key Features:

• 40mm Backset:
  Ideal for doors with narrow frames where a standard nightlatch may not fit.
• Deadlocking Function:
  Operated with the key from outside to deadlock the latch prevents handle operation from the inside, enhancing security.
• Polished Chrome Finish:
  Stylish and resistant to tarnishing, providing a contemporary look for any door.
• Automatic Latching:
  Door locks automatically when closed, offering convenience and peace of mind.
• Reversible Latch:
  Suitable for both left- and right-handed inward opening doors.
• Surface Mounted Design:
  Easy installation using included fixtures and basic tools.
• Internal Snib Button:
  Allows you to hold the latch open or secure it against unlocking (deadlocked mode).

What’s Included:

• 1 x Yale Nightlatch Lock Body (40mm backset)
• 1 x Polished Chrome Cylinder with Fixings
• 2 x Standard Yale Keys
• Strike Plate
• Fixing Screws
• Installation Instructions

Applications:

• Main entrance timber doors
• Secondary external timber doors
• Narrow stile doors where space is a constraint
• Residential front and rear doors requiring enhanced security

Installation Notes:

• Suitable for doors 35mm57mm thick
• The external cylinder passes through the door to operate the latch
• Can be installed with hand tools and basic DIY knowledge
• For optimal security, it is often used in combination with a 5-lever mortice deadlock

FAQs:

Q: What is a 40mm backset?
A: It refers to the distance from the edge of the door to the center of the keyhole. 40mm is ideal for narrow stile timber doors.

Q: Can I use this lock on an outward-opening door?
A: It’s designed for inward-opening doors. Outward-opening installation is not recommended without additional hardware and expertise.

Q: Does the lock automatically engage when the door closes?
A: Yes. The latch will automatically lock when the door is closed, unless the internal snib is used to hold it open.

Q: Can the deadlock feature be engaged from the inside?
A: Yes. Use the snib to deadlock the latch internally for additional security when at home.

Q: Can I get additional keys cut?
A: Yes, Yale keys can be duplicated at most hardware stores or locksmiths.

Warranty Information:

Yale provides a 2-Year Manufacturers Guarantee, covering:

• Manufacturing defects
• Mechanical failure under normal use
• Material faults

Excludes:

• Improper installation
• Damage caused by misuse or force
• Wear and tear due to abnormal use

For warranty service, retain your proof of purchase and contact Yale customer support or your retailer.

Why Choose the Yale 40mm Deadlocking Nightlatch?

• Trusted brand for home security
• Sleek chrome finish for modern aesthetics
• Compact 40mm backset perfect for narrow doors
• Enhanced security with inside and outside deadlock functions
• Easy DIY-friendly installation