Dead Locks

Reliable, Key-Operated Security for Doors

Dead locks (or deadlocks) are simple yet highly secure locking mechanisms commonly used on external wooden doors. Unlike sash locks, dead locks consist only of a key-operated deadbolt—there’s no latch or handle function—making them ideal for use with pull handles or in conjunction with a night latch or mortice knob.

These locks are available in 3-lever versions for internal security, and more secure 5-lever variants, including British Standard BS3621 models approved by insurers. With a variety of finishes like brass, chrome, black, and satin, dead locks suit both modern and traditional homes.

🔐 Key Features

Single bolt operated by key from both sides
Enhanced security for front or back doors
Available in 3-lever or 5-lever BS3621 options
Compatible with escutcheons and pull handles
Suitable for use with mortice knob sets or night latches

🏡 Ideal For:

✔️ External wooden doors
✔️ Doors without lever handles
✔️ Paired use with night latches for added security

❓ Frequently Asked Questions

Q: What is the main purpose of a dead lock?

A: A dead lock adds strong security by locking the door with a key-operated deadbolt. It’s commonly used on entrance doors or in conjunction with a night latch.

Q: Can I use a dead lock with lever handles?

A: Dead locks are usually paired with pull handles or knobs, not lever handles. If you need a handle and latch combination, a sash lock is more suitable.

Q: What’s the difference between 3-lever and 5-lever dead locks?

A: 3-lever dead locks are generally used indoors for low-security needs. 5-lever locks, especially BS3621 certified, provide higher security and meet insurance standards for external doors.